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To fast in Irish (troisc): Meaning, Conjugation, Examples

Other uses of ‘troisc’: abstain

The Irish for to fast is troisc; ag troscadh is fasting.
Updated October 2026Report a mistake

How to say “to fast” in Irish

Irish:
troisc
English:
to fast, abstain
Word type:
verb, first-conjugation
Verbal noun:
troscadh (ag troscadh, fasting)
Verbal adjective:
troiscthe
Pronunciation:
“trishk”  /t̪ˠɾˠɔʃc/

What does “troisc” mean?

“Troisc” has two alternative meanings. The most common comes first.

to fast
To go without food for a period, often for religious reasons.Also: go without food, starve oneself.
1 other meaning: abstain
2to abstain
To give up or do without a particular food, drink or habit (with 'ar').Also: give up, do without, refrain from.

“Troisc” in the different tenses

Every form follows An Caighdeán Oifigiúil.

Aimsir Chaite (Past)

PersonPositiveNegativeQuestion
mé (I)Throisc méI fastedNíor throisc méI did not fastAr throisc mé?Did I fast?
tú (you)Throisc túYou fastedNíor throisc túYou did not fastAr throisc tú?Did you fast?
sé / sí (he / she)Throisc sé / síHe fastedNíor throisc sé / síHe did not fastAr throisc sé / sí?Did he fast?
sinn (we)ThroisceamarWe fastedNíor throisceamarWe did not fastAr throisceamar?Did we fast?
sibh (you, plural)Throisc sibhYou fastedNíor throisc sibhYou did not fastAr throisc sibh?Did you fast?
siad (they)Throisc siadThey fastedNíor throisc siadThey did not fastAr throisc siad?Did they fast?
saorbhriathar (autonomous)TroisceadhNíor troisceadhAr troisceadh?

Aimsir Láithreach (Present)

PersonPositiveNegativeQuestion
mé (I)TroiscimI fastNí throiscimI do not fastAn dtroiscim?Do I fast?
tú (you)Troisceann túYou fastNí throisceann túYou do not fastAn dtroisceann tú?Do you fast?
sé / sí (he / she)Troisceann sé / síHe fastsNí throisceann sé / síHe does not fastAn dtroisceann sé / sí?Does he fast?
sinn (we)TroiscimidWe fastNí throiscimidWe do not fastAn dtroiscimid?Do we fast?
sibh (you, plural)Troisceann sibhYou fastNí throisceann sibhYou do not fastAn dtroisceann sibh?Do you fast?
siad (they)Troisceann siadThey fastNí throisceann siadThey do not fastAn dtroisceann siad?Do they fast?
saorbhriathar (autonomous)TroisctearNí throisctearAn dtroisctear?

Aimsir Fháistineach (Future)

PersonPositiveNegativeQuestion
mé (I)Troiscfidh méI will fastNí throiscfidh méI will not fastAn dtroiscfidh mé?Will I fast?
tú (you)Troiscfidh túYou will fastNí throiscfidh túYou will not fastAn dtroiscfidh tú?Will you fast?
sé / sí (he / she)Troiscfidh sé / síHe will fastNí throiscfidh sé / síHe will not fastAn dtroiscfidh sé / sí?Will he fast?
sinn (we)TroiscfimidWe will fastNí throiscfimidWe will not fastAn dtroiscfimid?Will we fast?
sibh (you, plural)Troiscfidh sibhYou will fastNí throiscfidh sibhYou will not fastAn dtroiscfidh sibh?Will you fast?
siad (they)Troiscfidh siadThey will fastNí throiscfidh siadThey will not fastAn dtroiscfidh siad?Will they fast?
saorbhriathar (autonomous)TroiscfearNí throiscfearAn dtroiscfear?

Modh Coinníollach (Conditional)

PersonPositiveNegativeQuestion
mé (I)ThroiscfinnI would fastNí throiscfinnI would not fastAn dtroiscfinn?Would I fast?
tú (you)ThroiscfeáYou would fastNí throiscfeáYou would not fastAn dtroiscfeá?Would you fast?
sé / sí (he / she)Throiscfeadh sé / síHe would fastNí throiscfeadh sé / síHe would not fastAn dtroiscfeadh sé / sí?Would he fast?
sinn (we)ThroiscfimisWe would fastNí throiscfimisWe would not fastAn dtroiscfimis?Would we fast?
sibh (you, plural)Throiscfeadh sibhYou would fastNí throiscfeadh sibhYou would not fastAn dtroiscfeadh sibh?Would you fast?
siad (they)ThroiscfidísThey would fastNí throiscfidísThey would not fastAn dtroiscfidís?Would they fast?
saorbhriathar (autonomous)ThroiscfíNí throiscfíAn dtroiscfí?

“Troisc” in a sentence: Irish examples

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

Throisc sí ar feadh an lae inné.
She fasted all day yesterday.
Troisceann go leor daoine le linn an Charghais.
Many people fast during Lent.
Troiscfidh mé ar fheoil Dé hAoine.
I will abstain from meat on Friday.
Throiscfeadh sé dá n-iarrfadh an sagart air.
He would fast if the priest asked him.
Níor throisc mé riamh ar feadh lae iomláin.
I never fasted for a whole day.
Ar throisc tú roimh an scrúdú fola?
Did you fast before the blood test?

Other verbs in Irish

More everyday Irish verbs to learn next.

To fast in Irish: frequently asked questions

What is the Irish for to fast?

The Irish for to fast is troisc (pronounced “trishk”). It is a first-conjugation verb; the verbal noun is troscadh.

What is the verbal noun of troisc?

The verbal noun of troisc is troscadh, used after ag for the continuous: ag troscadh (fasting). The verbal adjective is troiscthe.

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

Past: Throisc mé; negative Níor throisc mé; question Ar throisc mé?. Future: Troiscfidh mé; negative Ní throiscfidh mé; question An dtroiscfidh mé?.

What is the modh coinníollach of troisc?

The conditional (modh coinníollach) first person is Throiscfinn (I would fast); negative Ní throiscfinn; question An dtroiscfinn?.

Does troisc have more than one meaning?

Yes. Troisc can mean to fast or to abstain, depending on context; the first is the most common.

How do I say what someone is fasting from?

Use the preposition 'ar': 'troisc ar fheoil' means to abstain from meat.

What is the noun for a fast?

The verbal noun 'troscadh' also means a fast, as in 'bhí sé ar troscadh' (he was fasting).

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