伴 means “accompany, partner”

ともなう · tomonau

Also: consort, bring with, companion

Kun'yomi (Japanese reading)
ともなう
On'yomi (Chinese reading)
ハン, バン

JLPT N1 · Taught in secondary school · 7 strokes

The story

A person (亻) with their half (半): the other half who walks beside you. 伴う is to come with, as risk comes with reward, 伴侶 is a life partner, and 伴奏 is the piano part that accompanies a singer.

Used in 伴う (tomonau, to accompany/involve), 同伴 (douhan, accompanying), and 伴奏 (bansou, musical accompaniment)

More from Apart & Together

Learn 伴 and more kanji free on Fuji Learning · All kanji

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