gwylio

Welsh

gŵyl (in its initial sense of “vigil”, from Latin vigilia) +‎ -io

Despite being written with a "y", the vowel here is generally pronounced /ɪ/ in the north as tends to be the case when "y" follows "w".

gwylio (first-person singular present gwyliaf)

Conjugation of gwylio (literary)
	singular			plural			impersonal
	first	second	third	first	second	third	impersonal
present indicative/future	gwyliaf	gwyli	gwyli, gwylia	gwyliwn	gwyliwch	gwyliant	gwylir
imperfect (indicative/subjunctive)/conditional	gwyliwn	gwylit	gwyliai	gwyliem	gwyliech	gwylient	gwylid
preterite	gwyliais	gwyliaist	gwyliodd	gwyliasom	gwyliasoch	gwyliasant	gwyliwyd
pluperfect	gwyliaswn	gwyliasit	gwyliasai	gwyliasem	gwyliasech	gwyliasent	gwyliasid, gwyliesid
present subjunctive	gwyliwyf	gwyliech	gwylio	gwyliom	gwylioch	gwyliont	gwylier
imperative	—	gwyli, gwylia	gwylied	gwyliwn	gwyliwch	gwylient	gwylier

verbal noun	gwylio
verbal adjectives	gwyliedig gwyliadwy

Conjugation (colloquial)
inflected colloquial forms	singular			plural
inflected colloquial forms	first	second	third	first	second	third
future	gwylia i, gwyliaf i	gwyli di	gwylith o/e/hi, gwyliff e/hi	gwyliwn ni	gwyliwch chi	gwylian nhw
conditional	gwyliwn i, gwylswn i	gwyliet ti, gwylset ti	gwyliai fo/fe/hi, gwylsai fo/fe/hi	gwylien ni, gwylsen ni	gwyliech chi, gwylsech chi	gwylien nhw, gwylsen nhw
preterite	gwyliais i, gwylies i	gwyliaist ti, gwyliest ti	gwyliodd o/e/hi	gwylion ni	gwylioch chi	gwylion nhw
imperative	—	gwylia	—	—	gwyliwch	—

Note: All other forms are periphrastic, as usual in colloquial Welsh.

Mutated forms of *gwylio*
radical	soft	nasal	aspirate
gwylio	wylio	ngwylio	unchanged

Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.