List: popular word

popular  usually written using kana alone  suffix 

• leaving (on, open, unfinished, etc.)
• (doing) continuously, constantly, keep ...-ing

popular  rarely used kanji form  usually written using kana alone  adverb 

• while (one is at it), when, on the occasion of, at the same time (as), on one's way (to), by the way, incidentally, in passing

popular  search-only kana form  rarely used kanji form  usually written using kana alone  onomatopoeic or mimetic word  adverb  adverb taking the と particle 

• deeply, keenly, severely, completely, utterly
• intently, carefully, closely, attentively

popular  rarely used kanji form  JLPT N5  usually written using kana alone  adverb 

• very, awfully, exceedingly
• (not) at all, by no means, simply (cannot)

popular  rarely used kanji form  JLPT N1  usually written using kana alone  pre-noun adjectival  adjective (generic)  obsolete term  adverb 

• unexpected, unlikely, strange
• terrible, awful, horrible, serious, outrageous
• very, extremely

popular  search-only kanji form  JLPT N3  い adjective  adjective (generic)  interjection 

• unthinkable, unexpected, absurd, outrageous, preposterous, terrible
• absolutely not!, far from it!, impossible!, preposterous!, what a thing to say!, no way!
• (it was) no bother at all, not at all, don't mention it

popular  gikun or jukujikun  rarely used kanji form  search-only kanji form  JLPT N5  usually written using kana alone  adverb 

• how, in what way, how about

popular  search-only kanji form  usually written using kana alone  pre-noun adjectival  adjective (generic) 

• what kind of, what sort of, what

popular  onomatopoeic or mimetic word  adverb  adverb taking the と particle  noun or participle taking the aux. verb する  verb (generic)  noun (generic)  abbreviation  noun 

• noisily (running around), with heavy feet
• in a fluster, in a flurry, in a panic
• slapstick

popular  rarely used kanji form  usually written using kana alone  expression 

• both
• (not) either