unlike

erilainen Not like; dissimilar; diverse; having no resemblance.

The brothers are quite unlike each other.

They contributed in unlike amounts.

I unliked the video link after I realized it was making fun of me.

Facebook, for instance, allows you to register approval for a posted message in a very concrete way, by clicking a thumbs-up like button. Toggling off the button results in unliking your previously liked item. Note that this is different from disliking something, since unliking simply returns you to a neutral state.

My comment was more of a backhanded slap at Stern Pinball's Facebook "presence", specifically the garbage "cheap heat" posts. (..) It's so inane (and now, so constant) that I wound up "unliking" stern pinball entirely.