途中で道に迷ってしまいました。

N4 途中 tochuu on the way, midway N5 道 michi road, path

N3 途 to / michi route, way, road N5 中 chuu / naka, uchi, ata.ru in, inside, middle N4 道 dou, tou / michi, iu road-way, street, district N3 迷 mei / mayo.u astray, be perplexed, in doubt

N4 〜てしまう te shimau Indicates completed action with nuance of regret, surprise, or unexpected result, attaches to the te-form verb N5 〜ます masu Used at the end of verbs, polite present or future form, makes the sentence more polite N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context