無緣無故 (mou4 jyun4 mou4 gu3) — no reason, no cause, totally uncalled for in Cantonese
mouˎ₄無jyunˎ₄緣mouˎ₄無gu˗₃故简 无缘无故
Mandarin Pinyin: wu2 yuan2 wu2 gu4
Meaning of 無緣無故
nounno reason, no cause, totally uncalled for
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