Persister

[per-sist, -zist] /pərˈsɪst, -ˈzɪst/

verb (used without object)
1.
to continue steadfastly or firmly in some state, purpose, course of action, or the like, especially in spite of opposition, remonstrance, etc.:
to persist in working for world peace; to persist in unpopular political activities.
2.
to last or endure tenaciously:
The legend of King Arthur has persisted for nearly fifteen centuries.
3.
to be insistent in a statement, request, question, etc.
/pəˈsɪst/
verb (intransitive)
1.
(often foll by in) to continue steadfastly or obstinately despite opposition or difficulty
2.
to continue to exist or occur without interruption: the rain persisted throughout the night
v.

1530s, from Middle French persister (14c.), from Latin persistere “abide, continue steadfastly,” from per- “thoroughly” (see per) + sistere “come to stand, cause to stand still” (see assist). Related: Persisted; persisting.

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Persisting
[per-sist, -zist] /pərˈsɪst, -ˈzɪst/ verb (used without object) 1. to continue steadfastly or firmly in some state, purpose, course of action, or the like, especially in spite of opposition, remonstrance, etc.: to persist in working for world peace; to persist in unpopular political activities. 2. to last or endure tenaciously: The legend of King Arthur […]
Persistive
[per-sist, -zist] /pərˈsɪst, -ˈzɪst/ verb (used without object) 1. to continue steadfastly or firmly in some state, purpose, course of action, or the like, especially in spite of opposition, remonstrance, etc.: to persist in working for world peace; to persist in unpopular political activities. 2. to last or endure tenaciously: The legend of King Arthur […]

Persnickety
[per-snik-i-tee] /pərˈsnɪk ɪ ti/ adjective, Informal. 1. overparticular; fussy. 2. snobbish or having the aloof attitude of a snob. 3. requiring painstaking care. /pəˈsnɪkɪtɪ/ adjective 1. the US word for pernickety adj. 1889, alteration of pernickety (q.v.). adjective Overfastidious; finical; fussy [first form 1905+, second 1814+; fr Scots dialect]
Persona
[per-soh-nuh] /pərˈsoʊ nə/ noun, plural personae [per-soh-nee] /pərˈsoʊ ni/ (Show IPA), personas. 1. a person. 2. personae, the characters in a play, novel, etc. 3. the narrator of or a character in a literary work, sometimes identified with the author. 4. (in the psychology of C. G. Jung) the mask or façade presented to satisfy […]