On-line Te Reo Māori Dictionary

Haumaruru. 1. a. Languid. Ka haumaruru nga kanohi i te mate.—Ko to te tapapa, haumaruru tonu iho (Sh. T. 181). ‖ maruru.

2. Indifferent, unconcerned. Me mutu i konei te haumaruru o matou, me matakana nga kanohi i enei rangi e takoto nei.

3. Sullen, sulky.

4. n. A charm to enfeeble the enemy.

Williams Dictionary