pillow
枕 centers on a pillow: a cushion for the head during sleep or rest.
枕 combines 木 (wood) with 冘, which likely contributes the sound. The character originally referred to a wooden headrest or pillow.
The left side is wood 木, and the right side 冘 looks like a person resting their head on a block. Picture a wooden pillow supporting a sleeping head.
For チン, imagine resting your chin on a wooden pillow: chin -> チン, and the wood 木 supports your head.
pillow; bolster
bedside; near one's pillow
The Pillow Book (Heian-period collection of writings by Sei Shōnagon)
laying one's head in someone's lap; using someone's lap for a pillow
(railway) sleeper; (railroad) tie; crosstie
pillow word; decorative word used prefixally in classical Japanese literature
at the bedside where one dreams
Kusamakura (1906 novel by Natsume Sōseki); The Three-Cornered World; Grass Pillow
overnight stay when traveling (travelling)
ice pillow
nap
memory foam pillow
lying with one's head to the north (trad. position for dead bodies; taboo for sleeping)
fighting to the bitter end; going down with the ship; remaining in one's castle and fighting to the end
to appear in one's dream (of a deity or deceased; to advise, admonish, etc.)
oval pad with two long strips tied underneath the obi to make it look fuller
using one's arm as a pillow; resting one's head on one's arm
body pillow; hug pillow
pillow stuffed with buckwheat chaff, rice husks or similar material
bridal bed