Meaning

originA variant of gaum, from Middle English gome, from Old Norse gaumr, from Proto-Germanic *gaumō; compare Gothic 𐌲𐌰𐌿𐌼𐌾𐌰𐌽 (gaumjan, “observe”), and see gaum for more. The -r- was not originally pronounced but was a device used by non-rhotic dialects of English to indicate vowel length or quality (compare Burma, Myanmar, and juggernaut).

Etymology from Wiktionary, CC BY-SA 3.0