8 letters · 12 points in Scrabble
verb grow under conditions that promote development
verb sit on (eggs)
originFirst attested in 1641; borrowed from Latin incubātus, an alternative to incubitus, perfect passive participle of incubō (“to hatch”) (see -ate (verb-forming suffix) and -ate (adjective-forming suffix)), from in- (“in”) + cubō (“to lie”).
Etymology from Wiktionary, CC BY-SA 3.0