莱 is a bound form (b.f.) meaning 'fallow field' or 'weed', but in modern Chinese it appears almost exclusively in proper nouns — place names like 莱阳 (Láiyáng) and 莱芜 (Láiwú), and in the river name 莱茵河 (Láiyīnhé, the Rhine). You will not encounter it as an independent word; treat it as a morpheme that only occurs in fixed compounds.