hulun comm. the cause or reason for some event or situation. Nganney humlun hi namatayan dan hiya? What is the reason for their killing him? He-ay humlun. You are the cause. ‑um‑. Sim: gap’u, lummu. (sem. domains: 9.6.2.5 - Cause, 9.6.2.5.1 - Reason.) infl. humlun