deliberative (adj.)

1550s, "pertaining to deliberation," from Middle French délibératif or directly from Latin deliberativus "pertaining to deliberation," from past participle stem of deliberare "consider carefully, consult," literally "weigh well," from de, here probably "entirely" (see de-) + -liberare, altered (probably by influence of liberare "to free, liberate") from librare "to balance, make level," from libra "pair of scales, a balance" (see Libra). Meaning "characterized by deliberation" is by 1650s. Related: Deliberatively; deliberativeness.