Instructive

Adjective

 * 1) conveying knowledge, information or instruction.
 * Well, that was an instructive lesson.

Noun

 * 1)  A case in the Finnish language. It expresses the means or the instrument used to perform an action.

Thesaurus
admonitory, advisory, authoritative, autodidactic, binding, canonical, cautionary, coeducational, commanding, communicative, compelling, consultative, consultatory, cultural, decretal, decretive, decretory, dictated, dictating, didactic, directive, disciplinary, edifying, educating, educational, educative, enlightening, exhortative, exhortatory, expostulative, expostulatory, formulary, hard and fast, helpful, homiletic, hortative, hortatory, illuminating, imperative, informational, informative, informing, initiatory, introductory, jussive, lecturing, mandating, mandatory, monitorial, monitory, moralistic, moralizing, obligating, official, peremptory, preaching, preachy, preceptive, prescribed, prescript, prescriptive, propaedeutic, recommendatory, regulation, remonstrant, remonstrative, remonstratory, revealing, rubric, self-teaching, sententious, standard, statutory, teaching, tuitionary, warning

Etymology
instruct + -ive

Adjective

 * Dutch: instructief, leerrijk, leerzaam
 * Finnish:


 * French:
 * German: lehrreich, aufschlussreich, belehrend

Noun

 * Finnish: