חי

Hebrew

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Chai (symbol)

Root
ח־י־ה (ḥ-y-h)

חַי • (kháy) (feminine חַיָּה, masculine plural חַיִּים, feminine plural חַיּוֹת)

alive; hence raw (flesh); fresh (plant, water, year), strong; also (as noun, especially in the feminine singular and masculine plural) life (or living thing), whether literally or figuratively: - + age, alive, appetite, (wild) beast, company, congregation, life, lifetime, maintenance, + merry, multitude, + (be) old, quick, raw, running, springing, troop.
living, live
lively

חַי • (kháy) third-singular masculine past (pa'al construction)

Conjugation of חַי (see also Appendix:Hebrew verbs)

finite forms		masculine singular	feminine singular	masculine plural	feminine plural
non-finite forms		to-infinitive: לִחְיוֹת
past	first person	חָיִיתִי		חָיִינוּ
	second person	חָיִיתָ	חָיִית	חֲיִיתֶם	חֲיִיתֶן
	third person	חַי	חייתה \ חָיְתָה	חָיוּ
present	all persons	חַי	חַיָּה	חַיִּים	חַיּוֹת
future	first person	אֶחְיֶה		נִחְיֶה
	second person	תִּחְיֶה	תִּחְיִי	תּחְיוּ	תִּחְיֶינָה¹
	third person	יִחְיֶה	תִּחְיֶה	יִחְיוּ	תִּחְיֶינָה¹
imperative	second person	חֲיֵה	חֲיִי	חֲיוּ	חֲיֶינָה¹
notes		Uncommon in modern informal Hebrew, but used in formal speech and writing.

גר (gar), while חי can describe living in both senses, existence and residency, גר defines only the latter.
לחיים