i-adjective
troublesome; bothersome; too much effort
Describes a task or situation that feels like a hassle, making one reluctant to do it. Often used in the phrase もの臭いと思う.
毎日、料理をするのがもの臭い。
Cooking every day feels like too much trouble.
彼はもの臭いことは何もしない。
He never does anything that seems bothersome.
面倒くさい is more common and casual, often used for minor annoyances. もの臭い has a slightly more literary or old-fashioned feel and emphasizes the sense of something being a burden.
億劫 is a na-adjective/noun that also means 'bothersome' or 'too much effort', but is more formal and often used in written language. もの臭い is an i-adjective and feels more descriptive of a personal feeling.
Compound of もの (thing) and 臭い (stinking, smelling of), literally 'smelling of something', which developed the figurative sense of something being unpleasant or bothersome. The exact historical derivation is uncertain.