instructive

adj.指示的，教育的

instate, instead, instead of, instep, instigate, instigation, instigator, instil (US instill), instill, instillation, instinct, instinctive, instinctively, institute, institution, institutionalize, instruct, instruction, instructional, instructions, instructively, instructor, instrument, instrumental, instrumentalist, instrumentality, instrumentation, insubordinate, insubordination, insubstantial, insufferable, insufferably, insufficiency, insufficient, insufficiently, insular, insularity, insulate, insulated, insulating,