This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means "stand" and this means to stand something up. It also can mean to make something, both in a physical sense, like making a sound, and a mental sense, like making a plan.

Don't confuse this with 立つ. 立てる means that you're standing something up. As in, "I stood up the action figure" or "I will erect the flag." You're doing the action to something else.