tugaya' noun English. S.t. in which water flows, as a gutter of a roof. verb English. Flows, as of rain off a roof. Example sentence: Subanen. Sangga' mu lai su galun ta, pu' sungu na dumupi', buus meglugeb su tugaya'. English. Get our water jug out to catch (rainwater), because it's about to rain, later what flows will be dirty.