leaking

The verb 'leak' entered Middle English from Middle Dutch or Low German sources, carrying the core sense of a fluid escaping. Its ultimate origin is Proto-Germanic lekaną, which is related to the concept of dripping or becoming wet. The addition of the '-ing' suffix, descended from the Old English present participle ending '-ende', transforms the action into its ongoing or descriptive form. Thus, 'leaking' literally describes the continuous state or action of a substance escaping from a contained space, a concept later extended metaphorically to the unauthorized escape of information.

Structure: leak (to let fluid in/out) + ing (present participle suffix) - leak: Likely from Middle Dutch 'leken' or Middle Low German 'leken', meaning 'to drip, leak'. Its functional role is the core verb root. - ing: From Old English '-ende', the present participle suffix. Its functional role is to form the present participle/adjectival form of the verb.