sepek verb English. In a discussion, argument, litigation, has no answer; is convinced by the other argument. Example sentence: Subanen. Su timu'ay ditug Baking, mesasal gupia mektalu' dig betad laak sa' minateng su timu'ay ditug Dipudian, misepek gupia nda' mekektalu'. English. The headman in Baking spoke very loudly about custom, but when the headman arrived in Dipudian, he was silenced, he wasn't able to speak. Cultural Note. The response credited with being the convincing factor is considered truth. Synonym. pelepee'