Weebles Do This but They Don't Fall Down

This page is the CodyCross answer for the clue below from Space Exploration, Group 913, Puzzle 1 (Supernova Explosion).

Question is: Weebles Do This but They Don't Fall Down

and the answer is: WOBBLE

Word Meaning:

WOBBLE — An unsteady motion.

Definitions from Wiktionary.