地雷 じらい land mine #4,565 Meanings noun land mine colloquial topic that sets someone off; sensitive topic; taboo topic; trigger colloquial something that seems fine at first but turns out to be very bad (e.g. product, business); booby trap; pitfall Its kanji 地 チ、ジ ground, earth 雷 ライ · かみなり、いかずち、いかづち thunder, lightning bolt