προσ-καρτερέω, -ῶ
(καρτερός, strong, stedfast) [in LXX: Num.13:21 (חָזַק hith.), Tob.5:8 א, Da Th Su 1:6* ;]
to attend constantly, continue stedfastly, adhere to, wait on: with dative of person(s), Mrk.3:9, Act.8:13 10:7; with dative of thing(s), Act.1:14 2:42 6:4, Rom.12:12, Col.4:2; before ἐν, Act.2:46; εἰς, Rom.13:6.†
(AS)