Adverb
With the potential for certification.
Genuinely
To a great extent.
He is certifiably nuts
Undoubtedly, demonstrably.
Source: en.wiktionary.orgThe popular image that Hollywood is ruined by difficult prima donna actors is nonsense. They're certainly very nice to directors. I can't say the same about producers, who I found difficult, paranoid, and certifiably insane, mostly. Nigel Cole
Being the father of girls is a kind of illness, in its own way - since any guy who has tried to live in a house with a wife and two daughters is, without any doubt, going to go certifiably nuts. Steve Schirripa
Asian men in the U.S. are saddled with a troubling range of stereotypes: Whether framed as docile and submissive or rigid and emotionless, the perception is of a group so devoid of intimacy as to be certifiably sexless. Source: Internet
So a designed prep school with the “high standards” of an International Baccalaureate (IB) curriculum that will also be certifiably accepted in China, could go from the drawing board to the white board. Source: Internet
Hopkins is a certifiably insane place. Source: Internet
But as a player of football, the man is certifiably nuts. Source: Internet