A part
赤
Shown as a part of 3 words so far, read 2 ways.
あか 2 words
- 赤ちゃんあかちゃんbaby, infant
赤ちゃん · here “red”
- 赤字あかじdeficit, go in the red
赤字 · here “red”
せき 1 word
- 赤道せきどうequator
赤道 · here “red”
Also written with 赤
These words contain the character in their spelling but show no breakdown that names it, so nothing is claimed about its role in them.