m 3 i 1 d 2 d 2 l 1 i 1 n 1 g 2
8 letters · 13 points in Scrabble
Meaning
noun any commodity of intermediate quality or size (especially when coarse particles of ground wheat are mixed with bran)
verb put in the middle
adjective lacking exceptional quality or ability
originThe noun is probably from middle (noun) + -ing; the adjective is most likely derived from the noun, and the adverb from the adjective.
Etymology from Wiktionary, CC BY-SA 3.0