ichidan verb
Physical action of making a surface cave in or become hollow. Often used for metal, plastic, or soft materials.
車のドアを凹ませてしまった。
I accidentally dented the car door.
缶を足で凹ませる。
I crush the can with my foot.
ichidan verb
Figurative use: to make someone lose confidence, feel small, or be emotionally crushed. Often in the passive form 凹まされる.
彼の一言で完全に凹まされた。
I was completely deflated by his single remark.
そんなに凹ませるようなことを言わないで。
Don't say things that will put me down like that.