know one's stuff
Genuinely skilled here
To know one's stuff is to be competent or expert in a particular area: She really knows her stuff when it comes to contract law.
The phrase emphasizes practical knowledge and skill rather than credentials—someone who knows their stuff can deliver results.
Often used as reassurance or endorsement: Don't worry, the mechanic knows his stuff.
- credibilityQuality inspiring trust
- learningGaining knowledge gradually
- executionCompleting a planned task
- masteryComplete skill or control
- proficiencySkilled performance level
resourcefulness · adeptness · real deal · studying · craftsmanship · troubleshooting · competence · inside out · intelligence · specialization · skillfulness · diligence · veteran · been around the block · learned the hard way · expertise · subject matter expert · authority