"mountain peak" in Celtic place names (especially of roughly pyramidal peaks standing alone), 1788, from Gaelic beinn "peak, summit, mountain," from Old Irish *benno- "peak, horn, conical point," from PIE *bend- "projecting point."
they were climbing the ben
Bembo
bemoan
bemuse
bemused
bemusement
ben
bench
benchmark
bench-warmer
bend
bendable