To stop; to keep from. from 16th c.
“I brushed my teeth to prevent them from going yellow.”
To take preventative measures. from 16th c.
To come before; to precede. 16th-18th c.
To outdo, surpass. 16th-17th c.
To be beforehand with; to anticipate.
To keep safe; to defend; to guard; to prevent harm coming to.
“to protect a child from danger”
“This antivirus package will protect your computer from hackers.”
“Condoms are designed to protect against sexually-transmitted diseases.”
To book a passenger on a later flight if there is a chance they will not be able to board their earlier reserved flight.
keep (something) from happening
“action must be taken to prevent further accidents”
stop (someone) from doing something
“the guards threatened to bar the gates to prevent him leaving”
“locks won’t prevent a determined burglar from getting in”
(of God) go before (someone) with spiritual guidance and help.