na-adjective
lenient; overly soft; too easygoing
Describes a person, attitude, or judgment that is excessively lenient or forgiving, often with a negative connotation of being too soft.
彼の採点は大甘だ。
His grading is overly lenient.
あの先生は大甘だから、宿題を忘れても怒られない。
That teacher is so lenient that you won't get scolded even if you forget your homework.
na-adjective
overoptimistic; too hopeful; naively optimistic
Used for expectations, forecasts, or plans that are unrealistically optimistic, often implying a lack of caution.
その売上予測は大甘だった。
That sales forecast was overoptimistic.
彼の見通しはいつも大甘だ。
His outlook is always naively optimistic.