片思い, 片想い: unrequited love

刀鍛冶: a swordsmith

堅物: a moralist, a prude

片隅: corner

one parent (of two) / having one remaining parent due to bereavement

shouldering / taking on someone else's responsibility

to shoulder / take on someone else's responsibility

striking the shoulder to relieve pain / a tool for striking the shoulder to relieve pain / (figuratively) a gentle suggestion to resign from one's job

to strike the shoulder to relieve pain / (figuratively) to give a gentle suggestion to resign from one's job

(onomatopoeia) clattering