In Hebrew, to say someone has a "Rosh Kachol" is to say they have a "dirty mind".
a priori
toto caelo
Tabula rasa.
It's called an idiom. This means that the phrase is not to be taken literally and that it has another meaning. Since the phrase starts with "on", it's also a prepositional phrase.
I do not believe that this phrase was meant to be taken literally. It is more likely a metaphor meaning that if you go to court your "hands" (i.e.: background - motives - actions) had better be 'clean,' meaning honest and aboveboard.
simile
et cetera[et and + cetera the other (things)]
It comes from the Latin phrase "medium aevum," meaning literally "the Middle Age."
Idiom
Toto Caelo (Todays Mos Crossword )
'Not too hard' = (literally) 'No demasiado duro/a' But the context is important and can change the meaning of the phrase
Sorry, but it is a slang word, literally meaning "my d i c k"