List: adverb (fukushi)

popular  rarely used kanji form  JLPT N4  usually written using kana alone  adverb 

• if, in case, supposing

popular  rarely used kanji form  JLPT N2  usually written using kana alone  expression  adverb 

• perhaps, maybe, perchance, by some chance, by any chance

popular  rarely used kanji form  JLPT N1  usually written using kana alone  adverb 

• perhaps, possibly, maybe, by any chance, if I'm not mistaken
• if, in case, in the event that

popular  rarely used kanji form  JLPT N2  usually written using kana alone  adverb 

• perhaps, possibly, maybe, by some chance

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

• bashfully, hesitantly, fidgety, restlessly, squirming, wriggling, haltingly

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

• slowly, inefficiently, tardily, dawdling

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

• bulging (esp. of male genitals under clothing)

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

• hazy, misty, foggy, murky, fuzzy
• hazy feeling, uncertain feeling, feeling gloomy, feeling depressed, pent-up feelings, ill feeling

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

• (eating) heartily
• energetically, vigorously, (working) hard, enthusiastically
• bulging (muscles), welling up (of strength, courage, etc.)

rarely used kanji form  JLPT N1  usually written using kana alone  adverb 

• completely, all the way, altogether, bodily