SHEEPISH
shamefaced, sheepish
(adjective) showing a sense of shame
sheeplike, sheepish
(adjective) like or suggestive of a sheep in docility or stupidity or meekness or timidity
Source: WordNet® 3.1
Etymology
Adjective
sheepish (comparative more sheepish, superlative most sheepish)
Having the characteristics of a sheep.
Shy, meek, shameful or embarrassed.
Source: Wiktionary
Sheep"ish, a.
1. Of or pertaining to sheep. [Obs.]
2. Like a sheep; bashful; over-modest; meanly or foolishly diffident;
timorous to excess.
Wanting change of company, he will, when he comes abroad, be a
sheepish or conceited creature. Locke.
– Sheep"ish*ly, adv.
– Sheep"ish*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition