Simple past tense and past participle of clamber.(verb)
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Use "clambered" in a sentence
"But it all turned out fine in the end, with Stephen arriving home from a party just at the point I'd fortuitously clambered back out of the back yard and headed round to the front again."
"Frona and Corliss clambered on, the canoe between them."
"She blew through the gap of the pass in a whirlwind of vapor, with hand and foot clambered down the volcanic ruin of Chilcoot's mighty father, and stood on the bleak edge of the lake which filled the pit of the crater."