(to make) (something) made or done in imitation of another thing in order to deceive

fake, simulated

deceiving

dishonest

going round and not taking the direct way

dishonest, crafty

feeling, causing, doubt

questionable, unclear

(of a person) feeling doubt

doubtful

(of a word) having a double or doubtful meaning

doubtful, uncertain

(of an argument etc) wrong because based on error

false, wrong

weak; fragile

breakable, weak

not plausible

not likely

(almost) impossible to believe (because shocking); very surprising

beyond belief

(of a person, thoughts) confused (e.g. because of alcohol)

doubtful, uncertain

strange; unusual; causing doubt or suspicion; unwell; sick

odd; abnormal

to have an idea or feeling concerning the possibility or truth of (something); doubtful; possibly not true; a person suspected of doing wrong etc

doubtful

not ethical

dishonest, immoral