mandative
/ˈmandətɪv/ /manˈdeɪtɪv/adjective
1Commanding, authoritative.
2 Grammar. Conveying a command; specifically designating a subjunctive used in a subordinate clause (usually introduced by that) following an expression of command, suggestion, or possibility.
Origin
Late 16th century; earliest use found in Barnabe Googe (1540–1594), poet and translator. From post-classical Latin mandativus from classical Latin mandāt-, past participial stem of mandāre + -īvus.