The Collaborative International Dictionary of English v.0.48:
doltish \dolt"ish\ (d[=o]lt"[i^]sh), a. Doltlike; dull in intellect; stupid; blockish; as, a doltish clown. -- Dolt"ish*ly, adv. -- Dolt"ish*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
doltishly adv 1: in a stupid manner; "he had stupidly bought a one way ticket" [syn: stupidly, doltishly]