verbs
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"
is a type of (narrower)
become attached
"The spider's thread attached to the window sill"
attach to
"They fastened various nicknames to each other"
is a type of (narrower)
cause to be attached
make tight or tighter
"Tighten the wire"