ample

English ample comes from late Middle English ample, from Middle French ample, from Latin amplus, meaning 'large.'

Amplus itself may trace back to a fusion of ambi- ('around') and plus, related to plenus ('full') — suggesting something full on every side, before it settled into simply meaning generous or spacious in French and then English.

The ambi- element it may contain also shows up in English words like ambient, both pointing to the idea of surrounding or encircling something.