Abstract
There is no doubt that the study based on semantic fields is the focus of attracting the attention of scholars and care increases the Arabic lexicon is its field of study, for it depends on the arbitration of the meaning of words returning to their semantic fields. The Arabic lexicon is full of meanings that give the ability to select semantic fields in terms of words that share one meaning. We have chosen the Arabic lexicon which is (Almuhkam wa Almuheet Alaa'dham) by Ibn Seedah as a field for the study of the idioms "foolishness" because of the large number of words used and we have been careful in the selection of semantic fields which fall under each set of words after reading and compared with most of the Arabic dictionaries. Our work then was seeking the semantic connection between the meaning of idiocy represented by the lack of reason and weakness and the words that Ibn Seedah said by pointing to foolishness.
