unmanageable - uncontrollable, disobedient, difficult to deal with⏎
stagnant - inert, undeveloping, unchanging, not growing⏎
used - second-hand, pre-owned, employed, utilised, utilized⏎
undisclosed - concealed, hidden, not made known⏎
train - teach, instruct, tutor, coach, mentor, educate, edify, nurture, develop, school, explain, impart (facts/information), prepare, prime, demonstrate, illustrate⏎
vendor - seller, supplier⏎
yes - okay, affirmative, confirmed, agreed, understood⏎
secure - safe, protected, achieve (something)⏎
zenith - summit, top, peak⏎
temporary - short-term, non-permanent, makeshift⏎