[adj] sticking together; "two coherent sheets"; "tenacious burrs"
[adj] (of memory) having greater than average range; "a long memory especially for insults"; "a tenacious memory"
[adj] 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"