Reef the sail(s) phrase
"Sail(s)" can be specified as "the mainsail," "the jib," etc.
To adjust the sail to become smaller by tying or rolling up part of it to continue sailing without being overpowered by a strong wind.
If you know the techniques to reef the sails, you won't fear squalls when go sailing anymore.
After learning how to reef the sails, I feel confident enough to go sailing in any condition!
The captain reefed the mainsail, and then the boat bore away from the wind.
The verb "reef" must be conjugated according to its tense.
This phrase was formed based on the meaning of the verb "reef", which dates from 1660s.