Ligare
Defined in 3 dictionaries — Ballentine's (1916), Black's (1910), Kinney (1893)
Ballentine's Law Dictionary
James A. Ballentine · 1916
To join a league.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
To tie or bind. Bract, fol. 369b. To enter into a league or treaty. Spelman.
A Law Dictionary and Glossary
George C. Kinney · 1893
I. To tie, or bind; to enter into a league or treaty.