致 means “bring about, do (humble)”

ち · chi

Also: doth, do, send, forward

Kun'yomi (Japanese reading)
いたす
On'yomi (Chinese reading)
チ

JLPT N1 · Taught in secondary school · 10 strokes

The story

Arrive (至) plus a hand with a stick (攵): driving something until it gets where it is going. 一致 is a match or agreement, 致命的 is fatal, and 致します is the humble "I will do" of business email, now often written いたします.

Used in 一致 (icchi, agreement/match), 致命的 (chimeiteki, fatal), and 致す (itasu, to do, humble)

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.