done secretly; kept secret

secret, sly

(of glances, threats etc) hidden; disguised

clandestine, underhanded

often deceiving

dishonest, insincere

done secretly so as not to attract attention

sneaky, secretive

doing harm secretly or unseen

sneaky, tricky

deceitful; keeping or doing things secretly

clever, devious

secret; vague

sly

(of actions) done secretly

sneaky, secret

a pointed or thin end of something

walking on toes

acting secretly

secret, spy

deceitful(ly)

deceitful