flag one

block curb cut off delay deter disrupt hamper interfere retard slow stymie thwart

bar brake check clog dam discomfit disconcert embarrass faze freeze oppose rattle restrain stonewall stop

blow whistle on close off cramp one's style dead-end hang up hold up saddle with shut down shut off slow down

advance aid allow assist encourage expedite forward help permit promote push

comfort continue free go liberate open release soothe unblock unclog

facilitate support