(informal, figuratively) to grit one's teeth, to bite the bullet

(transitive with à) to shake hands with

(informal, figuratively) to tighten up on discipline, to be more severe

(military) to close ranks (to regroup forces) / (figuratively) to close ranks (to stay united, to make a show of unity, especially to the public; to maintain silence and secrecy in the face of some external threat)

(informal, figuratively) to tighten up; to brace oneself

(informal, figuratively) to tighten up on discipline; to become more severe; to cut down on expenses

(figuratively) to repress, increase coercion