yester adjective, adverb, & noun. ['jɛstǝ]
[Old English ġeostra, ġiestra = Old High German gestaron, gesterēn (German gestern), Middle Low German ghist(e)ren, Dutch gisteren, from Germanic base + compar. suffix -t(e)r-, from Indo-European base repr. also in Greek khthes, Sanskrit hyas, Latin heri yesterday (cf. also Latin hesternus of yesterday). In later use extracted from YESTERDAY.]
A. adjective. Of, pertaining to, or designating the day before today, yesterday. Now poet. exc. in comb. OE.
YESTERDAY. yestereve, yester-evening adverbs & nouns (now arch. & poet.) (on) the evening of yesterday, YESTER-EVEN. yestermorn, yester-morning adverbs & nouns (now arch., poet., & dial.) (on) the morning of yesterday, yesterday morning.
■ Day Lewis Betwixt My yester and my morrow self.
B. adverb. On the day before today, yesterday. OE-L18.
C. noun. The day before today, yesterday. E18-M19.

[TahlilGaran] English Dictionary ▲