Barefoot; having no shoes or socks on, with feet directly on the ground.
夏は裸足で砂浜を歩くのが気持ちいい。
It's nice to walk barefoot on the beach in summer.
家では靴を脱いで裸足で過ごすことが多い。
At home I often take off my shoes and go barefoot.
子どもたちが庭で裸足で走り回っている。
Children are running around barefoot in the yard.
(Figurative, as a suffix) used colloquially to indicate outshining or being far superior—appears in expressions like 'to make someone look barefoot' (i.e. overwhelmingly better).
彼の成績は同級生を裸足にするほど優れていた。
His grades were so good that they put his classmates to shame (he overwhelmingly outperformed them).