Kenneth G. Wilson (1923). The Columbia Guide to Standard American English. 1993.
chary (adj.)
meaning careful, cautious, sparing and pronounced CHER-ee, regularly combines with of, as in Im chary of door-to-door salesmen, and occasionally with about, as to, in, and with, as in She is chary about [as to] the people she is seen with. Fred is very chary in giving opinions. Im chary with praise.