Adverb (fukushi)
finally; in the end; at last
Usually written using kana alone
ついに病気で疲れた男たちは彼が待っている山岳都市に到着した。Finally, the sick, tired men reached the mountain town where he was waiting. in the end; after all; never (happened)
Usually written using kana alonewith neg. verb
Also written 終に【ついに】、竟に【ついに】