いかにも
truly, so typically, just as you'd imagine
いかにも + らしい · そう · Noun らしい
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いかにも says something fits a type or impression perfectly: いかにも京都らしい町並みだ, "a townscape that's so typically Kyoto".
It usually pairs with らしい ("typical of") or そう ("looks like"): いかにも楽しそうに話した, "he talked with obvious enjoyment"; いかにも高そうな時計, "a watch that looks really expensive".
It can be neutral or slightly ironic, depending on context: いかにも彼が言いそうなことだ, "that's exactly the sort of thing he'd say".
Compare さすが, which is admiration for living up to a reputation, and まるで, "just like (though it isn't)". In older or formal speech, いかにも on its own means "indeed, quite so".
Examples
いかにも京都らしい町並みだ。
It's a townscape that's so typical of Kyoto.
彼はいかにも楽しそうに話した。
He talked with obvious enjoyment.
いかにも彼が言いそうなことだ。
That's just the kind of thing he'd say.
いかにも高そうな時計をしている。
He's wearing a watch that looks really expensive.
いかにもプロらしい仕事ぶりだ。
That's exactly the kind of work you'd expect from a professional.