徹 - penetrate, clear, pierce

thorough; exhaustive; complete

cool-headed; level-headed; hard-headed

to penetrate; to sink in

staying up all night

accomplishment; realization; attainment; fulfillment; achievement

thoroughness; completeness; consistency

rustic; boorish; uncouth; adamantly sticking to being boorish

(logical) consistency; coherence; unchanging from beginning to end

stubbornly honest

attain divine enlightenment; perceive absolute truth; experience spiritual awakening

staunch (steadfast, single-hearted) in one's devotion to his master (lord)

thorough investigation; complete inquiry