relationship, relation / involvement, participation / personal connection, family relationship / romantic relationship

the past (period of time that has already happened)

(literally) Widowers and widowed, orphans and childless elderly. / (idiomatic) the lonely people of the world

看護婦: female nurse

simultaneity, concurrency, happening at the same time, synchronicity

宏作: a male given name / 幸作: a male given name

乾電池: dry cell

the dead of winter, the middle of winter

幾日も幾日も: day after day

購入: purchase or buy