克服【こくふく】
conquest (of a difficulty, illness, crisis, etc.), overcoming, surmounting, bringing under control
克明【こくめい】
detailed, scrupulous, careful, minute, faithful, elaborate, diligent, honest, upright, sincere
克己【こっき】
self denial, self control
相克【そうこく】
rivalry
下克上【げこくじょう】
juniors dominating seniors, inferiors overthrowing their superiors, retainer supplanting his lord