This is the 14805th most frequent Russian word.
плохим
"Плохим" means "bad" (masculine instrumental singular form of "плохой").
Adjective describing the quality of 'день' (day).
Этот день оказался плохим из-за дождя.
This day turned out bad due to the rain.
Adjective qualifying 'учителем' (teacher).
Его назвали плохим учителем за недостаток опыта.
He was called a bad teacher due to a lack of experience.
Adjective describing the quality of 'результат' (result).