Uneasy, unsettled, or ominous; describing an atmosphere or situation that seems unstable or threatening.
会場の空気が不穏になり、警備が増えた。
The atmosphere at the venue became uneasy, and security was increased.
最近、政治情勢が不穏だと報じられている。
It has been reported that the political situation has been unstable recently.
不穏な気配を感じたら、早めに避難してください。
If you sense something ominous, evacuate early.
経済指標が悪化し、市場は不穏な動きを見せた。
Economic indicators worsened, and the market showed unsettled movements.