Dull

"Dull" in Japanese

つまらない

tsumaranai

(boring, not exciting or interesting — see also boring)

退屈な

taikutsu na

(boring, not exciting or interesting — see also boring)

鈍い

nibui

(lacking the ability to cut easily; not sharp)

鈍い

nibui

(not bright or intelligent)

鈍い

noroi

(not bright or intelligent)

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.