unpropitious (adj.)
- adversative
- adverse
- alien
- antagonistic
- anti
- antipathetic
- antithetic
- apocalyptic
- bad
- baleful
- baneful
- black
- boding
- clashing
- competitive
- conflicting
- contradictory
- contrary
- counter
- cross
- dark
- dire
- dissentient
- dreary
- evil
- fateful
- foreboding
- fractious
- gloomy
- hostile
- ill
- ill-considered
- ill-fated
- ill-omened
- ill-starred
- ill-timed
- improper
- inappropriate
- inauspicious
- inconvenient
- inexpedient
- infelicitous
- inimical
- inopportune
- intrusive
- irrelevant
- late
- lowering
- malapropos
- menacing
- negative
- obstinate
- ominous
- opponent
- opposed
- opposing
- opposite
- oppositive
- perverse
- portentous
- premature
- recalcitrant
- refractory
- repugnant
- sinister
- somber
- threatening
- unbefitting
- uncooperative
- unfavorable
- unfit
- unfitting
- unfortunate
- unfriendly
- unhappy
- unlucky
- unpromising
- unready
- unripe
- unseasonable
- unsuitable
- untimely
- untoward
- wrong
