tenacious
adj
1 sticking or clinging firmly together or to an object 粘牢的; 粘住的; 抓牢的; 抓紧的
The eagle seized its prey in a tenacious grip. 鹰将捕获物紧紧抓住.
2 keeping a firm hold on property, principles, life, etc; resolute 紧握的; 不放松的; 坚决的
a tenacious adversary 紧逼不放的对手
She is tenacious in defence of her rights. 她坚决维护自己的权利.
3 (of memory) retentive; not forgetting things (指记忆力)持久的, 强的; 记性好的.