List: adverb (fukushi)

onomatopoeic or mimetic word  adverb  adverb taking the と particle 

• pleasantly (warm)
• faintly, lightly
• suddenly, unexpectedly
• accidentally, carelessly
• (gaping) wide, (opening one's mouth) wide

adverb 

• impromptu, on the spot, off the cuff, ad lib

adverb  archaic 

• or, otherwise
• furthermore, also
• perhaps, by some chance, possibly
• that being said, be that as it may
• however, but
• not to mention, needless to say
• as expected, sure enough
• really, at all

onomatopoeic or mimetic word  adverb  adverb taking the と particle 

• grinding (sound), grating, gnashing
• forcefully, strongly, with effort, (binding) tightly

adverb 

• empty-handed, barehanded, unarmed

rarely used kanji form  usually written using kana alone  expression  adverb  noun taking the genitive case particle の  adjective (generic)  な adjective 

• exactly the same, exactly as is, without any change

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

• restlessly, restively, agitated, fidgety

onomatopoeic or mimetic word  adverb  adverb taking the と particle 

• snugly (into hole, container, etc.), tightly (fitting, covering), firmly
• (with a) pop (i.e. sound of a cork, etc. being pulled out of a hole in one movement), with a plop, (fall) straight

obsolete reading  rare term  adverb 

• completely, thoroughly
• exactly, precisely
• comfortably
• not at all
• solidly, firmly

usually written using kana alone  adverb 

• being apt to, being liable to, being inclined to