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To strengthen in Irish (treisigh): Meaning, Conjugation, Examples

Other uses of ‘treisigh’: intensify · emphasize

The Irish for to strengthen is treisigh; ag treisiú is strengthening.
Updated October 2026Report a mistake

How to say “to strengthen” in Irish

Irish:
treisigh
English:
to strengthen, intensify, emphasize
Word type:
verb, second-conjugation
Verbal noun:
treisiú (ag treisiú, strengthening)
Verbal adjective:
treisithe
Pronunciation:
“TRESH-ee”  /tʲɾʲɛʃə/

What does “treisigh” mean?

“Treisigh” has three alternative meanings. The most common comes first.

to strengthen
To make something stronger or more powerful.Also: reinforce, fortify, boost.
2 other meanings: intensify or emphasize
2to intensify
To increase in force or intensity, or to make something more intense.Also: increase, heighten.
3to emphasize
To stress or reinforce a point or statement.Also: stress, back up.

Other Irish verbs for to strengthen: neartaigh (strengthen), láidrigh (strengthen)

“Treisigh” in the different tenses

Every form follows An Caighdeán Oifigiúil.

Aimsir Chaite (Past)

PersonPositiveNegativeQuestion
mé (I)Threisigh méI strengthenedNíor threisigh méI did not strengthenAr threisigh mé?Did I strengthen?
tú (you)Threisigh túYou strengthenedNíor threisigh túYou did not strengthenAr threisigh tú?Did you strengthen?
sé / sí (he / she)Threisigh sé / síHe strengthenedNíor threisigh sé / síHe did not strengthenAr threisigh sé / sí?Did he strengthen?
sinn (we)ThreisíomarWe strengthenedNíor threisíomarWe did not strengthenAr threisíomar?Did we strengthen?
sibh (you, plural)Threisigh sibhYou strengthenedNíor threisigh sibhYou did not strengthenAr threisigh sibh?Did you strengthen?
siad (they)Threisigh siadThey strengthenedNíor threisigh siadThey did not strengthenAr threisigh siad?Did they strengthen?
saorbhriathar (autonomous)TreisíodhNíor treisíodhAr treisíodh?

Aimsir Láithreach (Present)

PersonPositiveNegativeQuestion
mé (I)TreisímI strengthenNí threisímI do not strengthenAn dtreisím?Do I strengthen?
tú (you)Treisíonn túYou strengthenNí threisíonn túYou do not strengthenAn dtreisíonn tú?Do you strengthen?
sé / sí (he / she)Treisíonn sé / síHe strengthensNí threisíonn sé / síHe does not strengthenAn dtreisíonn sé / sí?Does he strengthen?
sinn (we)TreisímidWe strengthenNí threisímidWe do not strengthenAn dtreisímid?Do we strengthen?
sibh (you, plural)Treisíonn sibhYou strengthenNí threisíonn sibhYou do not strengthenAn dtreisíonn sibh?Do you strengthen?
siad (they)Treisíonn siadThey strengthenNí threisíonn siadThey do not strengthenAn dtreisíonn siad?Do they strengthen?
saorbhriathar (autonomous)TreisítearNí threisítearAn dtreisítear?

Aimsir Fháistineach (Future)

PersonPositiveNegativeQuestion
mé (I)Treiseoidh méI will strengthenNí threiseoidh méI will not strengthenAn dtreiseoidh mé?Will I strengthen?
tú (you)Treiseoidh túYou will strengthenNí threiseoidh túYou will not strengthenAn dtreiseoidh tú?Will you strengthen?
sé / sí (he / she)Treiseoidh sé / síHe will strengthenNí threiseoidh sé / síHe will not strengthenAn dtreiseoidh sé / sí?Will he strengthen?
sinn (we)TreiseoimidWe will strengthenNí threiseoimidWe will not strengthenAn dtreiseoimid?Will we strengthen?
sibh (you, plural)Treiseoidh sibhYou will strengthenNí threiseoidh sibhYou will not strengthenAn dtreiseoidh sibh?Will you strengthen?
siad (they)Treiseoidh siadThey will strengthenNí threiseoidh siadThey will not strengthenAn dtreiseoidh siad?Will they strengthen?
saorbhriathar (autonomous)TreiseofarNí threiseofarAn dtreiseofar?

Modh Coinníollach (Conditional)

PersonPositiveNegativeQuestion
mé (I)ThreiseoinnI would strengthenNí threiseoinnI would not strengthenAn dtreiseoinn?Would I strengthen?
tú (you)ThreiseofáYou would strengthenNí threiseofáYou would not strengthenAn dtreiseofá?Would you strengthen?
sé / sí (he / she)Threiseodh sé / síHe would strengthenNí threiseodh sé / síHe would not strengthenAn dtreiseodh sé / sí?Would he strengthen?
sinn (we)ThreiseoimisWe would strengthenNí threiseoimisWe would not strengthenAn dtreiseoimis?Would we strengthen?
sibh (you, plural)Threiseodh sibhYou would strengthenNí threiseodh sibhYou would not strengthenAn dtreiseodh sibh?Would you strengthen?
siad (they)ThreiseoidísThey would strengthenNí threiseoidísThey would not strengthenAn dtreiseoidís?Would they strengthen?
saorbhriathar (autonomous)ThreiseofaíNí threiseofaíAn dtreiseofaí?

“Treisigh” in a sentence: Irish examples

Past, present, future and conditional, with a negative and a question.

Threisigh siad an balla le clocha móra.
They strengthened the wall with big stones.
Treisíonn aclaíocht rialta na matáin.
Regular exercise strengthens the muscles.
Treiseoidh an traenáil seo do dhroim.
This training will strengthen your back.
Threiseodh sé sin ár seasamh go mór.
That would greatly strengthen our position.
Níor threisigh an ghaoth go dtí an oíche.
The wind didn't strengthen until night.
Ar threisigh siad an droichead fós?
Have they reinforced the bridge yet?

Other verbs in Irish

More everyday Irish verbs to learn next.

To strengthen in Irish: frequently asked questions

What is the Irish for to strengthen?

The Irish for to strengthen is treisigh (pronounced “TRESH-ee”). It is a second-conjugation verb; the verbal noun is treisiú.

What is the verbal noun of treisigh?

The verbal noun of treisigh is treisiú, used after ag for the continuous: ag treisiú (strengthening). The verbal adjective is treisithe.

How do you say treisigh in the past and the future?

Past: Threisigh mé; negative Níor threisigh mé; question Ar threisigh mé?. Future: Treiseoidh mé; negative Ní threiseoidh mé; question An dtreiseoidh mé?.

What is the modh coinníollach of treisigh?

The conditional (modh coinníollach) first person is Threiseoinn (I would strengthen); negative Ní threiseoinn; question An dtreiseoinn?.

Does treisigh have more than one meaning?

Yes. Treisigh can mean to strengthen, to intensify or to emphasize, depending on context; the first is the most common.

What is the difference between 'treisigh' and 'neartaigh'?

Both mean to strengthen; 'neartaigh' is more about physical strength, while 'treisigh' is also used for reinforcing, boosting or intensifying, as in 'treisigh an comhartha' (boost the signal).

How do I say 'to support someone' with this verb?

Use 'treisigh le', as in 'threisigh sé liom' (he backed me up).

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