This is one of the superpowers of the Tagalog language! A **gitlapi** is an affix that you jam right into the middle of a root word. The most common ones are '-um-' and '-in-'. For example, you take 'kain' (eat), insert '-um-' after the first consonant, and you get 'k**um**ain' (ate). It's like a word sandwich. Unlapi (prefix) + Salitang-ugat + Hulapi (suffix) is the normal combo, but Gitlapi is the special ingredient inside.