sinister (n.)
sinister (adj.)
- adverse
- antagonistic
- apocalyptic
- backhand
- backhanded
- bad
- baleful
- baneful
- base
- black
- boding
- circuitous
- conflicting
- conscienceless
- contrary
- corrupt
- corrupted
- counter
- counteractive
- counterclockwise
- criminal
- crooked
- dark
- detrimental
- deviant
- devious
- diabolical
- difficult
- digressive
- dire
- disastrous
- dishonest
- dishonorable
- divergent
- doubtful
- dreary
- dubious
- evasive
- evil
- excursive
- fateful
- felonious
- fishy
- foreboding
- fraudulent
- furtive
- gloomy
- hard
- harmful
- hostile
- ill
- ill-fated
- ill-gotten
- ill-omened
- ill-starred
- immoral
- improper
- inaccurate
- inauspicious
- indirect
- inexpedient
- inferior
- inimical
- insidious
- invalid
- larboard
- left
- left-hand
- left-handed
- left-wing
- levorotatory
- liberal
- lowering
- malefic
- maleficent
- malevolent
- malicious
- malign
- malignant
- menacing
- minacious
- minatory
- miserable
- near
- nefarious
- nigh
- oblique
- ominous
- opposed
- opposing
- opposite
- peccant
- pernicious
- port
- portentous
- questionable
- radical
- rigorous
- rotten
- shady
- shameless
- shifty
- side
- sidelong
- sinful
- sinistral
- sinistrorse
- slippery
- sneaky
- somber
- stressful
- suspicious
- threatening
- treacherous
- tricky
- troublesome
- troublous
- trying
- unconscientious
- unconscionable
- underhand
- underhanded
- unethical
- unfavorable
- unfortunate
- unhealthy
- unkind
- unlucky
- unpleasant
- unprincipled
- unpromising
- unpropitious
- unsavory
- unscrupulous
- unskillful
- untoward
- vicious
- villainous
- wicked
- wretched
- wrong
