1. fly-by-night, shady

(of businesses and businessmen) unscrupulous

Example Sentences:
'a shady operation'

Synonyms

• fly-by-night

Similar Words

• untrustworthy
• untrusty

2. louche, shady

of questionable taste or morality

Example Sentences:
'a louche nightclub'
'a louche painting'

Synonyms

• louche

3. fishy, funny, shady, suspect, suspicious

not as expected

Example Sentences:
'there was something fishy about the accident'
'up to some funny business'
'some definitely queer goings-on'
'a shady deal'
'her motives were suspect'
'suspicious behavior'

Synonyms

• fishy
• funny
• suspect
• suspicious

4. shadowed, shadowy, shady, umbrageous

filled with shade

Example Sentences:
'the shady side of the street'
'the surface of the pond is dark and shadowed'
'we sat on rocks in a shadowy cove'
'cool umbrageous woodlands'

Synonyms

• shadowed
• shadowy
• umbrageous