• 致いたします — (humble) to do
• 一致いっち — agreement / match
• 致命的ちめいてき — fatal / critical
• 致死ちし — lethal
• 致死量ちしりょう — lethal dose
• 誘致ゆうち — invitation / attraction (e.g. investment)
• 送致そうち — sending (a person, e.g. to court)

致 consists of the radical 至 (reach) and elements that suggest direction or sending. Its core sense is “to cause” or “to send toward” an outcome.

In keigo, 致す is the humble version of する, widely used in business and polite communication. In medical or legal contexts, it often indicates fatal results, as in 致死 or 致命的.

ご案内あんないを 致いたします。
I will guide you. (formal/humble)

その事故じこは 致命的ちめいてきでした。
The accident was fatal.