IPA: /ˈruːt.lɪt/
KK: /ˈrutlɪt/
A small part of a root or a tiny root itself.
The gardener carefully examined the rootlet to ensure it was healthy.
Rootlet → It is formed from "root" (from Old English "wēod", meaning the part of a plant that attaches it to the ground) and "-let" (a diminutive suffix meaning small or little). The word "rootlet" refers to a small root or a minor root structure of a plant.
Think of a 'small root' — 'root' is the main part of a plant, and '-let' means little, so a rootlet is a little root.