The verb 'talk' emerged in Middle English (c. 1200) as 'talken', a frequentative form of the Old English verb 'tellan', meaning "to tell, relate, count." The frequentative suffix '-k' (a common Germanic formative) implied repeated or ongoing action, thus shifting the sense from a single act of telling to the process of conversing. It is cognate with Middle Low German 'talken', meaning "to chatter." The noun form developed from the verb in the late 15th century. The word's journey illustrates a common pattern where a basic verb of utterance is modified to describe a more continuous or informal mode of speech.

The word 'talk' is a simplex word of Germanic origin. It is not productively composed of smaller, separable morphemes in modern English.