A look at a few
Mano a mano
A direct or face-to-face confrontation.
Etymology: hand to hand. It basically meant on an equal footing, without advantage to either of two contestants.
A gunman; hired killer.
Etymology: pistol + -ero. The suffix '-ero' is equivalent to the suffix '-ary' in English which has the general sense of “pertaining to, connected with”
To leave hurriedly or quickly; decamp.
Etymology: From vamos ‘let us go’
A minor offense.
Etymology: "slight sin," from pecado "a sin"
Without the means or right of communicating with others.
Etymology: From incomunicar, ‘to deny communication’