Quick definitions from WordNet (shy)

▸ noun:  a quick throw ("He gave the ball a shy to the first baseman")
▸ verb:  throw quickly
▸ verb:  start suddenly, as from fight
▸ adjective:  wary and distrustful; disposed to avoid persons or things ("Shy of strangers")
▸ adjective:  easily startled or frightened
▸ adjective:  lacking self-confidence
▸ name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #13408)

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▸ Also see shy