dhuva : [adj.] stable; permanent; regular; constant.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Dhuva (adj.) [Sk. dhruva, cp. Lith. drúta firm; Goth. triggws=Ohg. triuwi (Ger. treue, trost); Ags. tréowe= E. true, of Idg. *dheru, enlarged form of *dher, see dharati] stable, constant, permanent; fixed, regular, certain, sure D i.18; S i.142; iv.370; A ii.33; J i.19; v.121 (˚sassataŋ maraṇaŋ); iii.325; Bu ii.82; Miln 114 (na tā nadiyo dh -- salilā). 334 (˚phala); Vism 77; DA i.112 (maraṇaŋ apassanto dh.), 150 (=thāvara); DhA iii.170 (adhuvaŋ jīvitaŋ dhuvaŋ maraṇaŋ); ThA 241; Sdhp 331. -- nt. permanence, stability M i.326; Dh 147. Also Ep. of Nibbāna (see ˚gāmin). -- nt. as adv. dhuvaŋ continuously, constantly, always J ii.24=Miln 172; PvA 207; certainly J i.18, v.103. -- adhuva (addhuva) changing, unstable, impermanent D i.19 (anicca a. appāyuka); M i.326; S iv.302; Ji.393; iii.19 (addhuva -- sīla); VvA 77.
   -- gāmin leading to permanence, i. e. Nibbāna S iv.370(magga); -- colā (f.) constantly dressed, of a woman Vin iii.129; -- ṭṭhāniya lasting (of shoes) Vin i.190; -- dhamma one who has reached a stable condition DhA iii.289; -- paññatta (a) permanently appointed (seat) Vin iv.274; -- bhatta a constant supply of food Vin i.25, 243; ii.15 (˚ika); J i.449 (where the v. l. dhura˚ seems to be preferable instead of dhuva˚, see dhurabhatta); cp. niccabhatta; -- yāgu constant (distribution of) rice-gruel Vin i.292 sq.; -- lohitā (f.) a woman whose blood is stagnant Vin iii.129; -- ssava always discharging, constantly flowing J i.6, v.35.

Pali-English Dictionary, TW Rhys Davids, William Stede,

dhuva: a. 永久

巴漢辭典 編者：(斗六) 廖文燦