to be skillful; to be expert in; to be experienced in.
köken: From Old Khmer ជំនាញ (jaṃnāña, “talented; expert; skilled; capable”), whence Thai ชาญ (chaan). Cognate with Lao ຊຳນານ (sam nān) and Modern Khmer ជំនាញ (cumniəñ), an extended form of Khmer ជាញ (ciəñ).