The Collaborative International Dictionary
Leagued
League \League\, v. i. [imp. & p. p. Leagued; p. pr. & vb. n.
Leaguing.] [Cf. F. se liguer. See 2d League.]
To unite in a league or confederacy; to combine for mutual
support; to confederate.
--South.
Wiktionary
leagued
vb. (en-past of: league)