forfen

Old Irish

for- +‎ Proto-Celtic *winati (“enclose (with a wattle fence)”), from Proto-Indo-European *wyeh₁- (“to weave, plait”). The Old Irish simplex *fenaid is unattested.^[1]

for·fen (verbal noun forbae)

Complex, class B IV present, reduplicated preterite, a subjunctive
		active						passive
		singular			plural			singular	plural
		1^st	2^nd	3^rd	1^st	2^nd	3^rd	singular	plural
present indicative	deut.	for·fiun		for·fen				for·fenar
present indicative	prot.							·farbanar

imperfect indicative	deut.
imperfect indicative	prot.

preterite	deut.
preterite	prot.

perfect	deut.			for·ruchui				far·cuadh (normalized for·cúad)
perfect	prot.			·forchui

future	deut.
future	prot.

conditional	deut.
conditional	prot.

present subjunctive	deut.						for·fiat
present subjunctive	prot.			·farfia

past subjunctive	deut.
past subjunctive	prot.

imperative

verbal noun		forbae
past participle		foirbthe
verbal of necessity

Mutation of *for·fen*
radical	lenition	nasalization
for·fen	for·ḟen	for·fen pronounced with /β̃ʲ-/

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

^ Schumacher, Stefan, Schulze-Thulin, Britta (2004) “Urkelt. *-wi-na- ‘flechten, biegen’”, in Die keltischen Primärverben: ein vergleichendes, etymologisches und morphologisches Lexikon [The Celtic Primary Verbs: A comparative, etymological and morphological lexicon] (Innsbrucker Beiträge zur Sprachwissenschaft; 110) (in German), Innsbruck: Institut für Sprachen und Literaturen der Universität Innsbruck, →ISBN, page 688f.