There are several words you may use: complete, desist, discontinue, cease, or finish.
Persevere means to continue forward despite opposition or discouragement.
continue (reccommend pls)
If it's an Arabic word, it means Continue, Link or Connect.
atom
indestructible
Enigma
unbreakable
something that cannot be avoided = inevitable
Unique means cannot be replicated or one-of-a-kind.
inestimable
Blind.
Irrefutable means cannot be disproved or dissagreed with.