The Writing Debate: 'Mempengaruhi' vs 'Memengaruhi'

The misspelling 'mempengaruhi' occurs because speakers tend to preserve the phoneme /p/ from the base word 'pengaruh' intact, as though the only addition is the prefix 'mem-' without any deletion process. Lay linguistic intuition treats 'mem-' + 'pengaruhi' as already 'complete' and 'clear', when in fact morphophonemic rules specifically require the deletion of that /p/. This tendency is reinforced by a false analogy with words like 'memperkuat' (to strengthen) or 'memperluas' (to expand), where the /p/ from the prefix 'per-' is indeed preserved and does not undergo deletion. Speakers conflate two structurally distinct morphological patterns.

The word 'memengaruhi' derives from the base word 'pengaruh' (influence), absorbed from Classical Malay with roots traced to Sanskrit, carrying the meaning of a spreading force or effect. In its affixation process, the prefix 'me-' meets a base word beginning with the phoneme /p/. According to the morphophonemic rules of Indonesian, the initial /p/ of a base word undergoes deletion (known as 'peluluhan' or phoneme loss) when it encounters the prefix 'me-', producing the nasal assimilation 'mem-' which then absorbs and drops the /p/, yielding 'memengaruhi' — not 'mempengaruhi'.

The variant 'mempengaruhi' is extremely common in social media, blog articles, and semi-formal documents. Its dominance is so pervasive that many native Indonesian speakers perceive the standard form 'memengaruhi' as strange or even incorrect. This phenomenon reflects the gap between formal written language and the living language of everyday practice. In academic and professional journalism circles, correcting this word often serves as a marker of linguistic competence, while also sparking compelling discussions about how rigorously formal rules should be enforced in an era of fast-paced digital communication.