noun
obstacle; hindrance; impediment
Refers to a person or thing that physically or metaphorically blocks progress or makes something difficult.
彼はプロジェクトの邪魔者だ。
He is an obstacle to the project.
この大きな岩が道の邪魔者になっている。
This big rock is an obstruction on the road.
noun
Describes a person who is annoying, in the way, or a bother to others; often used in social contexts.
彼はいつも人の話を遮る邪魔者だ。
He's a nuisance who always interrupts people.
パーティーであんなに騒ぐなんて、本当に邪魔者だ。
Making such a racket at the party, he's a real burden.
Compound of 邪魔 (じゃま, hindrance) and 者 (もの, person). The variant 邪魔物 uses 物 (もの, thing) to include non-human obstacles.