lose, error, fault, disadvantage, loss
失 centers on losing something or being at a disadvantage: a loss, a mistake, or a fault that puts one in a worse position.
失 is thought to combine 手 (hand) and a mark indicating something slipping away, representing the idea of losing or dropping something.
The left stroke looks like something falling away from the larger right part 夫. Imagine a person (夫) dropping something important and losing it.
For シツ, imagine losing a sheet of important paper: sheet -> シツ, and the loss is a fault.
failure; mistake; blunder
discourtesy; impoliteness
to lose
loss (of assets, profit, etc.)
loss; forfeit
lost point (in a game); point given away; conceded goal
disqualification; elimination; incapacity
unemployment
disappearance; running away; going missing; absconding
disappointment; despair
accident (caused by negligence); error; blunder
disappointed love; broken heart; unrequited love; being lovelorn
loss; going missing
fainting; losing consciousness; passing out
blunder; fault; error; mistake; failure; disgrace
stall
losing one's position; losing one's standing; downfall; fall (from power); being overthrown
loss of eyesight; loss of sight; going blind; blindness
abasement; fall; forfeiture; sinking (in people's estimation)
blunder; slip; error
to lose sight of; to miss
disappointment; despair; despondency; broken heart; adversity
rudeness; impoliteness; disrespect; impertinence
malnutrition
failure story; horror story
advantages and disadvantages; plus and minuses
my apologies; I'm sorry; excuse me
excuse me; pardon me; I beg your pardon
absconding; disappearance
error made by the enemy or opposing team
involuntary manslaughter; accidental homicide; negligent homicide
lost article; lost property