Thayer's Greek Lexicon

 1. to adhere to one, be his adherent, to be devoted or constant to one
2. to be steadfastly attentive unto, to give unremitting care to a thing
3. to continue all the time in a place
4. to persevere and not to faint
5. to show one's self courageous for
6. to be in constant readiness for one, wait on constantly