Read Edit View history 効 xiào efficacious Origin Definitions Defs Strokes Stroke Words Sentences Sents ← Back to history approved by Peter Olson · Feb 19, 2022, 04:07 AM · Reviewed by Peter Olson on Feb 19, 2022, 04:07 AM 效 Variant of 效. Character Evolution Clerical Eastern Han 25-220 AD ▼ More ▲ Less Sources Historical images Academia Sinica