1375–1425 for earlier sense; 1565–75 for current senses; late Middle English < Latinconsīderātus (past participle of consīderāre to consider), equivalent to consīderā- (stem of consīderāre) + -tus past participle suffix
Related formscon·sid·er·ate·ly, adverbcon·sid·er·ate·ness, nouno·ver·con·sid·er·ate, adjectiveo·ver·con·sid·er·ate·ly, adverbo·ver·con·sid·er·ate·ness, nounqua·si-con·sid·er·ate, adjectivequa·si-con·sid·er·ate·ly, adverb
1570s, "marked by deliberation," from Latin consideratus, past participle of considerare (see consider). Of persons, "deliberate, prudent," 1580s; meaning "showing consideration for others" is from c.1700. Related: Considerately; considerateness.