毕竟‘bìjìng’ (after all, all in all, in the final analysis, when all is said or done): The adverb suggests the nature or the key point of a matter (see (1a)), and used in written language, it also means ‘finally, at long last’ (see (1b)):
Tā bìjìng hái tài niánqīng, jīnyàn bù zú.
(In the final analysis, she is too young, so she does not have enough experience.)
Zhè dào shùxué nántí, tā bìjìng suàn chūlai le
(He finally succeeded in working out this difficult mathematical problem.)
 Loar, J. K. (2011). Chinese syntactic grammar: functional and conceptual principles. New York: Peter Lang.