 A part of speech is the result of a series of hylomorphic compositions starting with articulated sound (vox). First, the word (dictio) is the result of the hylomorphic composition of an articulate sound (vox) and the relation of signification (ratio  significationis).[4]  This relation links the articulate sound to the thing signified (res significata, for res significata, see Rosier-Catach 1995), regardless of the thing’s different modes of being (modi essendi; for modi essendi, see Donati 2013). In fact, things and their modes of being are not identical. For instance, a horse may happen to be a particular horse, a universal horse, my horse, etc., but being particular, being universal, being mine, etc. are all different from being a horse.