pertinacious+in+maintaining
1tenacious of — Persistent in holding, pertinacious in maintaining, holding fast, holding tight …
2Bruno, Giordano — orig. Filippo Bruno born 1548, Nola, near Naples died Feb. 17, 1600, Rome Italian philosopher, astronomer, mathematician, and occultist. He entered a Dominican convent in 1565 and was ordained a priest in 1572. He abandoned the order in 1576… …
3insistent — insistently, adv. /in sis teuhnt/, adj. 1. earnest or emphatic in dwelling upon, maintaining, or demanding something; persistent; pertinacious. 2. compelling attention or notice: an insistent tone. [1615 25; < L insistent (s. of in sistens), prp …
4tenacious — Synonyms and related words: adamant, adherent, adhesive, amylaceous, assiduous, balking, balky, bigoted, bound, bound and determined, bulldogged, bulldoggish, bulldoggy, bulletheaded, bullheaded, cartilaginous, case hardened, chewy, clabbered,… …
5persistent — I (Roget s IV) modif. Syn. tenacious, steadfast, determined; see resolute 2 . II (Roget s 3 Superthesaurus) a. persevering, determined, dogged, tenacious, unrelenting, steadfast, resolute, diligent, untiring, stalwart, stubborn, sustained,… …