(of a person, action) immoral; dishonest

dishonest

often deceiving

dishonest, insincere

deceiving

dishonest

going round and not taking the direct way

dishonest, crafty

not honest

lying, untruthful

done secretly so as not to attract attention

sneaky, secretive

using any means to get what one wants and not caring about morality etc

scheming

deceitful(ly)

deceitful

too much

excessive, unnecessary

that cannot be relied on; not to be trusted

not trustworthy, not true

not caring about being honest or doing wrong

immoral

cunning (the usual word)

crafty, clever