Is a word used together with something that represents 'like as if' such as みたい or よう (様). It means "It's almost like as if it is (....)"
このゲームはものすごくリアルだ。丸で映画を見ているようだ。 This game is really realistic. It's almost like as if I'm watching a movie.
あの人の仕事の仕方はまるで楽らくなみたいだ。 the way that person does their work, it makes it almost look like as if it is fun.
彼は弟にそっくりだ。まるで兄弟ようだ。 He looks like the spitting image of my younger brother. It is like as if they are siblings.