இடைச்சொல்

iṭai-c-col   n. id. +.Particle which cannot be used by itself inany sense but which, when occurring in combination with nouns and verbs, functions asinflectional or conjugational suffix, adverb, preposition, expletive, conjunction, interjection,etc., one of the four parts of speech in Tamilgrammar; பெயர்வினைகளோடு சார்ந்துவழங்குஞ்சொல். (நன். 420.)