Where does “lith” come from?

lith (Old Frisian) comes from Proto-West Germanic liþu, from Proto-Germanic liþuz, from Proto-Indo-European h₂el- — to grow, nourish; beyond, other; to wander, roam.

Ancestry of “lith”, step by step

StepLanguageWordMeaning
1Proto-West Germanicliþubend, joint; limb
2Proto-Germanicliþuza bend, joint; a body part, limb, member
3Proto-Indo-Europeanh₂el-to grow, nourish; beyond, other; to wander, roam
Every word from Proto-Indo-European h₂el- →Every word from Proto-Germanic liþuz →Every word from Proto-West Germanic liþu →