tyfu

Welsh

Etymology

From Proto-Brythonic *tüβ̃id, from Proto-Celtic *tumīti, ultimately from Proto-Indo-European *tum-.

Pronunciation

• (North Wales) IPA^(key): /ˈtəvɨ̞/
• (South Wales) IPA^(key): /ˈtəvi/
• Rhymes: -əvɨ̞

Verb

tyfu (first-person singular present tyfaf)

1. (intransitive) to grow (become bigger in size)
2. (transitive) to grow, to cultivate
3. (intransitive) to grow, to increase, to rise

   Synonym: cynyddu

Conjugation

Conjugation (literary)

	singular			plural			impersonal
	first	second	third	first	second	third
present indicative/future	tyfaf	tyfi	tyf, tyfa	tyfwn	tyfwch	tyfant	tyfir
imperfect (indicative/subjunctive)/ conditional	tyfwn	tyfit	tyfai	tyfem	tyfech	tyfent	tyfid
preterite	tyfais	tyfaist	tyfodd	tyfasom	tyfasoch	tyfasant	tyfwyd
pluperfect	tyfaswn	tyfasit	tyfasai	tyfasem	tyfasech	tyfasent	tyfasid, tyfesid
present subjunctive	tyfwyf	tyfych	tyfo	tyfom	tyfoch	tyfont	tyfer
imperative	—	tyf, tyfa	tyfed	tyfwn	tyfwch	tyfent	tyfer
verbal noun	tyfu
verbal adjectives	tyfadwy

Conjugation (colloquial)

Inflected colloquial forms	singular			plural
	first	second	third	first	second	third
future	tyfa i, tyfaf i	tyfi di	tyfith o/e/hi, tyfiff e/hi	tyfwn ni	tyfwch chi	tyfan nhw
conditional	tyfwn i, tyfswn i	tyfet ti, tyfset ti	tyfai fo/fe/hi, tyfsai fo/fe/hi	tyfen ni, tyfsen ni	tyfech chi, tyfsech chi	tyfen nhw, tyfsen nhw
preterite	tyfais i, tyfes i	tyfaist ti, tyfest ti	tyfodd o/e/hi	tyfon ni	tyfoch chi	tyfon nhw
imperative	—	tyfa	—	—	tyfwch	—
Note: All other forms are periphrastic, as usual in colloquial Welsh.

Derived terms

• tyfiant (“growth; tumour”)
• tyfwr (“grower”)

Related terms

• twf (“growth”)

Mutation

Welsh mutation
radical	soft	nasal	aspirate
tyfu	dyfu	nhyfu	thyfu
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

References

• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “tyfu”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies