Words are created when no there are no close translations that exist. Most of the time, existing words can be used as a basis. For example, if you wanted to invent a word that means "incinerate," the existing words yol "fire," ag "burn," or toor "inferno" might be good starting points.

It's best to have a thorough understanding of the language before considering new words. This way, the words you create will fit the conventions of the language and won't conflict with other words.