lithe

Sounds like "light" and something which is light in weight can easily be moved and bended.

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remember Blithe(careless, light hearted, flexible)....both means almost the same

Rearrange the letters HE is LIT(light) so he can move or bend with ease

The word lithe resembles to Lithium is a soft, silver-white metal that belongs to the alkali metal group of chemical elements.