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ニコニコ : adv vs 1）(on-mim) with a friendly grin 2）smilingly P
ニタニタ : adv n vs 1）(on-mim) broad grin
ニコ中 / ニコちゅう : n abbr 1）nicotinism
ニコン / にこん : 1）Nikon
ニコイチ : n vs 1 uk 1）combining the working parts of two or more broken machines to make one functioni... 2 uk 2）manufacturing one part out of multiple different parts
ニコラス : n 1）Nicholas P
ニコチン : n 1）nicotine P
ニコチン / にこちん : 1）nicotine 2）nicotinic
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ニコニコ

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