bù xiè
untiring
unremitting
indefatigable
sōng xiè
to relax
to relax efforts
to slack off
to take it easy
complacent
undisciplined
jiān chí bù xiè
to persevere unremittingly (idiom); to keep going until the end
bù xiè dài
untiring
without slacking
sù yè fěi xiè
to work from morning to night (idiom)
xiè qì
to slacken off
to take it easy