modestly or warily rejecting approaches or overtures; "like a wild young colt, very inquisitive but very coy and not to be easily cajoled"
showing marked and often playful or irritating evasiveness or reluctance to make a definite or committing statement; "a politician coy about his intentions"
affectedly modest or shy especially in a playful or provocative way
an unexpected and inexplicable change in something (in a situation or a person's behavior, etc.); "the vagaries of the weather"; "his wealth fluctuates with the vagaries of the stock market"; "he has dealt with human vagaries for many years"
the branch of quantum physics that accounts for matter at the atomic level; an extension of statistical mechanics based on quantum theory (especially the Pauli exclusion principle)