A part
索
Shown as a part of 2 words so far, read one way.
さく 2 words
- 索引さくいんindex, indices
索引 · here “search for”
- 模索もさくgroping (for)
模索 · here “cord”
Also written with 索
These words contain the character in their spelling but show no breakdown that names it, so nothing is claimed about its role in them.