Fasten has 5 different meanings across 1 category:
Verb
cause to be firmly attached
"fasten the lock onto the door"
"she fixed her gaze on the man"
become fixed or fastened
"This dress fastens in the back"
attach to
"They fastened various nicknames to each other"
make tight or tighter
"Tighten the wire"
To attach or connect in a secure manner.