Origin: bef. 1000; late ME
schey (adj.), early ME
scheowe, OE
scēoh; c. MHG
schiech; akin to D
schuw, G
scheu; cf. eschew 
Related forms: shyer, noun
shyly, adverb
shyness, noun
Synonyms:
1. Shy, bashful, diffident imply a manner that shows discomfort or lack of confidence in association with others. Shy implies a constitutional shrinking from contact or close association with others, together with a wish to escape notice: shy and retiring. Bashful suggests timidity about meeting others, and trepidation and awkward behavior when brought into prominence or notice: a bashful child. Diffident emphasizes self-distrust, fear of censure, failure, etc., and a hesitant, tentative manner as a consequence: a diffident approach to a touchy subject. 4. heedful, cautious, chary. 10. shrink.
Antonyms:
1. forward. 2. trusting. 4. careless. 10. advance.