argumentativo
argumentative
argument
a reason or set of reasons given in support of an idea, action or theory
+
-ativo
adjective suffix (tending to)
Argumentativo means argumentative and can be thought of as argument0 + -ativo1 (tending to1), describing someone who tends to argue.
adjective
- argumentativeCharacterized by or given to argument; contentiousSu tono argumentativo no ayudó a resolver el conflicto. // His argumentative tone didn't help resolve the conflict.