to thwart; to obstruct (sth)

to surrender; to yield; to flex

variant of 干擾|干扰[gan1 rao3], to interfere

to scratch; to mess about with; to quarrel; to scramble to do; sb or sth that one can rely on

backscratcher (made from bamboo etc)

unyielding; indomitable

to keep on fighting in spite of all setbacks (idiom); to be undaunted by repeated setbacks; to be indomitable