pitfall - difficulty, danger, peril, trap⏎
procedure - policy, usual or correct way of doing things⏎
operate - control, use, work, function⏎
motivate - encourage, push⏎
priceless - extremely valuable, important, very precious⏎
middleman - intermediary, mediator, agent⏎
motion - proposal⏎
notional - estimated, guessed, suppositional⏎
pull - influence, attract interest, cancel an event⏎
observer - watcher, spectator⏎