guarantee - promise, safeguard, legal agreement, make certain,⏎
legitimate - legal, genuine, legally acceptable⏎
mark-up - increase in price, overcharge⏎
hardball - aggression, firmness, determination⏎
knowledge - information, skills, understanding, comprehension, mastery⏎
expire - end, finish, elapse⏎
haggle - argue, barter, bargain⏎
exercise - activity, keep fit, work-out, act, invoke, apply⏎
mean - average, middle⏎