Tenacious

вя́зкий

vjázkij

(clinging to an object or surface; adhesive)

кле́йкий

kléjkij

(clinging to an object or surface; adhesive)

кре́пкий

krépkij

(having a good memory; retentive)

ли́пкий

lípkij

(clinging to an object or surface; adhesive)

насто́йчивый

nastójčivyj

(unwilling to yield from a point of view etc; dogged)

связующий

svjazujuščij

(holding together; cohesive)

упо́рный

upórnyj

(unwilling to yield from a point of view etc; dogged)

упря́мый

uprjámyj

(unwilling to yield from a point of view etc; dogged)

це́пкий

cépkij

(having a good memory; retentive)