• start, introduce, cause, consideration, source, impetus, factor, initiation, stimulus, opening, root, begin, origin, neglect, base, beginning, incentive, antecedent, introduction, lessen, inspiration, halt, basis, mother, commencement, spring, instigation, precede, unfulfillment, failure, determinant, decrease, stop, keep, disappear, create, initiate, foundation, ground, commence, decline, groundwork, ignore.