Merriam-Webster's Collegiate® Dictionary, 11th Edition
DELIBERATE
I. verb (-ated; -ating)
Date: 14th century
intransitive verb to think about or discuss issues and decisions carefully, transitive verb to think about deliberately and often with formal discussion before reaching a decision, see: think
II. adjective
Etymology: Middle English, from Latin deliberatus, past participle of deliberare to consider carefully, perhaps alteration of *delibrare, from de- + libra scale, pound
Date: 15th century
characterized by or resulting from careful and thorough consideration , characterized by awareness of the consequences , slow, unhurried, and steady as though allowing time for decision on each individual action involved , see: voluntary deliberately adverb deliberateness noun