1. (

• retentive ,
• recollective ,
• long ,
• tenacious

) good at remembering; "a retentive mind"; "tenacious memory" ;

2. (

• dogged ,
• dour ,
• persistent ,
• pertinacious ,
• tenacious ,
• unyielding

) stubbornly unyielding; "dogged persistence"; "dour determination"; "the most vocal and pertinacious of all the critics"; "a mind not gifted to discover truth but tenacious to hold it"- T.S.Eliot; "men tenacious of opinion" ;

3. (

• coherent ,
• tenacious

) sticking together; "two coherent sheets"; "tenacious burrs" ;