徹底【てってい】
thoroughness, completeness, consistency, thorough enforcement, seeing to it that a policy, etc. is carried out without exception
徹夜【てつや】
staying up all night
徹する【てっする】
to penetrate, to sink in, to devote oneself (to), to do intently and exclusively, to do throughout (e.g. the night)
冷徹【れいてつ】
cool-headed, level-headed, hard-headed
貫徹【かんてつ】
accomplishment, realization, attainment, fulfillment, achievement, penetration, pervasion