How to Spell certain
certain
certain - adjective
- Fixed, settled
- Of a specific but unspecified character, quantity, or degree
- Dependable, reliable
- Known or proved to be true : indisputable
Source: Merriam-Webster Dictionary API
"a certain percentage of the profit"
Etymology
Middle English certeyn, certayne, borrowed from Anglo-French certein, certain, going back to Vulgar Latin *certānus, from Latin certus "fixed, settled, indisputable," originally past participle of cernere "to sift, discern, decide, determine" (going back to an Indo-European present stem *kri-n-, verbal adjective *kri-to-, from a verbal base *krei̯̯̯(h)- "sift, separate," whence Greek krī́nein "to separate, choose, decide," verbal adjective kritós, Welsh gogrynu "to sift") + -ānus + -an:2
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