insufficiency

n. 缺乏，不足之处

institute, institution, institutionalize, instruct, instruction, instructional, instructions, instructive, instructively, instructor, instrument, instrumental, instrumentalist, instrumentality, instrumentation, insubordinate, insubordination, insubstantial, insufferable, insufferably, insufficient, insufficiently, insular, insularity, insulate, insulated, insulating, insulating tape, insulation, insulator, insulin, insult, insulting, insuperable, insuperably, insupportable, insurance, insurance broker, insurance policy, insurance premium,