The phenomenon of lexical meaning’s motivation of words, as a complex process of identification, reflection and selection of objects and realities of the world around, represents an actual subject for the contemporary linguistics, being investigated in correlation and interconnection with the processes of metaphorisation and derivation in a certain language, seen from synchronic and diachronic point of view. The motivation of a new lexeme formation is determined by the evolution of the internal form of this word. The Romanian verbs of behavior constitute a rich and varied material for presenting the various manifestations of lingual sign’s motivation.