ominous
OMINOUS implies having a menacing, alarming character foreshadowing evil or disaster. e.g. ominous rumblings from the volcano
PORTENTOUS suggests being frighteningly big or impressive but now seldom definitely connotes forewarning of calamity. e.g. an eerie and portentous stillness
FATEFUL suggests being of momentous or decisive importance. e.g. the fateful conference that led to war
https://gyazo.com/3e15f96801b922ddde8f9bb57ac97d0f
source: [あんハピ♪の花小泉杏たちの前を黒猫が通過するGIF画像|無料GIF画像検索 GIFMAGAZINE 940333] adjective
不吉な, 胸騒ぎのする
e.g. there were ominous dark clouds gathering overhead.
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ORIGIN