yield - produce, submit, relinquish⏎
x-rated - adult, pornographic, unsuitable for children and under-age people⏎
tangible - touchable, existing, clearly seen⏎
secondary - inferior, unimportant, less important⏎
temporary - short-term, non-permanent, makeshift⏎
unprofitable - uneconomic, unproductive, profitless⏎
standards, rules, regulations - fall, decrease, fail, ruin⏎
skilled - experienced, qualified⏎
swindle - cheat, deceive, act fraudulently⏎