"tenacious" in the adjective sense
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"
Source: WordNet® (An amazing lexical database of English)
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