The Writing Debate: 'Mempercayai' vs 'Memercayai'

The misspelling 'mempercayai' is extremely common because speakers intuitively attach the full prefix 'mem-' directly before the root word 'percaya', without awareness of the phonemic elision process. Everyday logic leads people to conclude that 'me-' + 'percaya' + '-i' equals 'mempercayai'. However, Indonesian morphophonemic rules stipulate that the initial consonant 'p' of a root word must be elided when it meets the prefix 'me-', producing a nasal sound that flows directly into the following syllable. Interference from spoken pronunciation further reinforces this error, as in casual conversation the boundary between prefix and root is often phonetically indistinct.

The word 'memercayai' derives from the root word 'percaya', which was borrowed from the Sanskrit 'pratyaya', meaning belief or trust. In Indonesian, the root word 'percaya' receives the prefix 'me-' and the suffix '-i', forming the verb 'memercayai'. This morphological process follows Indonesian phonotactic rules, whereby the prefix 'me-' merging with a root word beginning with the consonant 'p' causes that 'p' to assimilate into the nasal sound 'mem-', resulting in the elision of 'p' from the first syllable of the root, thereby producing 'memercayai' rather than 'mempercayai'.

The confusion between 'mempercayai' and 'memercayai' reflects a broader phenomenon in Indonesian society: a general lack of familiarity with the morphophonemic system governing root words that begin with the consonants 'p', 'k', 't', and 's'. The erroneous variant is so pervasive—appearing even in formal writing, online media, and social media captions—that many speakers are entirely unaware it is non-standard. This is further reinforced by hypergeneralization, where speakers apply prefixation patterns uniformly without accounting for exceptions. Ironically, the incorrect form often sounds more 'logical' and 'natural' to most people's ears, making corrections to this word frequently contested or outright rejected in public discourse.