deturni

The preposition doing duty as a prefix. De is the all-purpose from, and welded to the front of turni it gives turning something away from something else. That is the whole word. Esperanto builds a lot of its verbs this way, and the useful habit is to read the prefix as the preposition it still is: deturni ion de io keeps the same de twice over, once inside the verb and once in front of the thing you are turning away from.

Transitive, and the reflexive matters. You turn a thing away: your eyes, your head, a blow, somebody's attention. To turn yourself away you either say deturni sin with the reflexive pronoun or use deturniĝi, and the second is the tidier of the two: ŝi deturniĝis is she turned away. Both are correct, and -iĝ- is the suffix that saves you the pronoun.

Two ranges of meaning, both live. Physically it is the eyes and the face: deturni la rigardon, to look away, which is one of the commonest phrases the word appears in. Figuratively it is diverting somebody from a purpose or warding something off: deturni danĝeron, to avert a danger, and deturni la atenton, to distract. English avert and divert carry the same two ranges, and Latin built its avertere from exactly the same pieces.

The prefix family is worth having in one place. Turni is to turn, returni to turn back, forturni to turn away and off, alturni to turn towards, renversi to turn over or upset. Beside them, eviti is to avoid, which is what you do with your feet rather than with your face.