-ktiv, -tēv also -təv adjective
Etymology: probably from Middle French instructif, from Latin instructus (past participle) + Middle French -if -ive
: conveying knowledge : serving to instruct or inform
experience furnishes very instructive lessons
such experiences are instructive
• in·struc·tive·ly -tə̇vlē, -li adverb
• in·struc·tive·ness -tivnə̇s, -tēv- also -təv- noun -es