Also gʷel-. To throw, reach, with further meaning to pierce. Oldest form *gʷelə₁-, with metathesized variant *gʷleə₁-, contracted to *gʷlē-.
Derivatives include devil, emblem, metabolism, parliament, problem, symbol, ballet, and kill1.
I. Words denoting to throw, reach. Variant *gʷlē-, contracted from *gʷleə-.
1. Suffixed zero-grade form *gʷl̥-n-ə-.
b. ball2, ballad, ballet, bayadere, from Greek ballizein, to dance.
2. Suffixed o-grade form *gʷol(ə)-ā-. bolometer, from Greek bolē, beam, ray.
3. Possible suffixed o-grade form *gʷol(ə)-sā-. boule1, abulia, from Greek boulē, determination, will (< “throwing forward of the mind”), council.
4. Suffixed full-grade form *gʷelə-mno-. belemnite, from Greek belemnon, dart, javelin.
II. Words denoting to pierce.
1. Suffixed o-grade form *gʷol-eyo-.
a. quell, from Old English cwellan, to kill, destroy;
b. quail2, from Middle Dutch quelen, to be ill, suffer. Both a and b from Germanic *kwaljan.
2. Suffixed zero-grade form *gʷl̥-yo-. kill1, from Middle English killen, to kill, perhaps from Old English *cyllan, to kill, from Germanic *kuljan.
3. Full-grade form *gʷel-. belonephobia, from Greek belonē, needle.
[Pokorny 2. gᵘ̯el- 471, 1. gᵘ̯el- 470.]

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