adverb
Etymology: Middle English discretly, from discret, discreet + -ly
: in a discreet manner: as
a. : tactfully , prudently
his utterances never gave offense, being discreetly academic
b. : with restraint : judiciously , carefully , unobtrusively
rouge discreetly applied to the cheek — Edward Sapir
do not let a canary's claws grow too long … but trim them discreetly — Emily Holt