Origin of brachiate; from brachio- + -ate
intransitive verbbra·chi·at·ed, bra·chi·at·ing, bra·chi·ates
Origin of brachiateLatin brācchiātus, from brācchium, arm. V., from New Latin brāchiāre, brāchiāt-, from brācchium; see brachium.
From Latin brachiatus, from brachium ‘arm, branch’.
(third-person singular simple present brachiates, present participle brachiating, simple past and past participle brachiated)
Back-formation from brachiator.