Reconstruction:Proto-Germanic/hulaz

Etymology
. Various explanations have been proposed, none without problems.
 * From, the root of . The regular outcome of the zero grade would be , but it is possible that u was inserted to avoid a nonsyllabic root, by analogy with many other Germanic zero grades.
 * From . A long vowel would be expected in the zero grade due to the following laryngeal, but Kroonen explains this away as "pretonic shortening". In this case, related to and.

Adjective

 * 1) hollow