[v] adjust the spaces between words; in printing; "justify the margins"
[v] defend, explain, clear away, or make excuses for by reasoning; "rationalize the child's seemingly crazy behavior"; "he rationalized his lack of success"
[v] show to be right by providing justification or prove; "vindicate a claim"
[v] show to be reasonable
[v] let off the hook; "I absolve you from this responsibility"