si'au'i SI experimental cmavo

erases a word; pretend the next word ≈ the erased word

The resulting utterance is a translated pun, where the joke is that in the source language, the removed word sounds like or is the same as the word following si'au'i.

In notes:

erases a SI, SA or SU cmavo; is to "redo" as SI/SA/SU is to "undo".