致(いた)すTo do (Humble)

いたす, or 致(いた)す as it is often written, is a humble speech う-Verb, which refers to the actions of the speaker (or people within the speakers inner circle, like their company). Similarly to お〜する, いたす means 'to do'.

In the case of する verbs themselves, simply replace する with いたす. For other verbs, add いたす to the ます stem of the verb, while attaching お, or ご to the beginning (depending on whether it is a word of Japanese or Chinese origin).

Caution

Words that include the kanji 拝(はい) 'to worship', or 'to revere', do not usually require お, ご, or いたす. This is due to the word itself being 'respectful'.

Fun Fact

いたす is considered to be slightly more humble than お〜する, which means that it will be heard more frequently in advertisements, or being used by company employees.