-음직 builds an adjective meaning something looks or seems worth doing: 먹음직스럽다 'looks good to eat', 믿음직스럽다 'looks trustworthy', 있음직하다 'sounds plausible'. Those three words account for every line here, most often in food captions praising how appetising something looks. It is a fixed piece of word-building, not something you can attach freely to any verb.