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tenacious

1 ENTRIES FOUND:
tenacious /təˈneɪʃəs/ adjective
tenacious
/təˈneɪʃəs/
adjective
Britannica Dictionary definition of TENACIOUS
[more tenacious; most tenacious]
: not easily stopped or pulled apart : firm or strong
: continuing for a long time
: very determined to do something

— tenaciously

adverb

— tenacity

/təˈnæsəti/ noun [noncount]