Sentence:  The Indo-Aryan languages or <WSD>macrolanguages</WSD> of the plains merge into each other, being on the local level made up of enormous dialect continua (e.g. PANJABI-HINDI-BIHARI-RAJASTHANI-PAHARI). ¶ These fluid ‘<WSD>macrolanguages</WSD>' (indicated by capital letters, e.g. HINDI) may have “dialects” which are mutually unintelligible and hard to classify. 
Meaning of the word marked with <WSD> tags:  A language consisting of widely varying dialects.