From an unused root meaning to exhale; garlic (from its rank odor) -- garlic.
H7762. shuwm
[שׁוּם] noun [masculine] garlic; — plural שׁוּמִים Numbers 11:5 (J) (allium sativum, Linn, Thes LöwNo. 336 PostHast. DB ii. 110 TristrNHB 448 (or allium Ascalonicum, compare Buhl, after TristrFFP 430; see this and PostFlora 789 for many kinds of allium); Arabic , Aramaic תּוּמָא, , Assyrian šûmu).
שֻׁמָתִי see שֻׁמָה infra.