(baseball) an eye for discerning whether a pitch is a strike or not

expert, special

(mathematics) linear algebra

war (conflict involving organized use of arms)

an upperclassman / an older alumnus (graduate) of one’s school / a person who entered one’s workplace earlier; a senior; one who has seniority / an elder (one who is older)

Chinese emperor sacrifice ceremony / Chinese emperor abdicating the throne / meditative concentration / dhyana, Zen Buddhism

dhyana; deep meditation; contemplation

darning / repair

ship, vessel, large ship

transition, move, change