falling (into a hole) / a sinkhole; a subsidence; a place where the ground has fallen into a hole / falling in battle; capitulation; surrendering / falling in rank or status; demotion

fall, cave in / surrender / be persuaded

cheese

simplification

to simplify

simple, plain

simplicity

堕落: to corrupt, to backslide, to degenerate

堕落: depravity, corruption, degradation

楽天: optimism