[Adverbs And Adjectives]
[Adverbs Expressing Time]
"at last," "finally," "after all," "in the end"
Tōtō indicates that an expected situation has come about after a considerable amount of time has passed.
待っていた 手紙 は とうとう こなかった。
Matte ita tegami wa tōtō konakatta.
The letter that I had been waiting for didn't come after all.
彼女 は過労 と 心配 の ため、 とうとう 病気 に なった。
Kanojo wa karō to shinpai no tame, tōtō byōki ni natta.
Due to overwork and anxiety, she finally fell ill.
Hope this helps!
°˖ ✧◝(○ ヮ ○)◜✧˖ °こゆうき あいはら°˖ ✧◝(○ ヮ ○)◜✧˖ °