John Woldemar Cowan, The Complete Lojban Language — Chapter 19 - Putting It All Together… (1997)
“ There are two ways to hesitate in Lojban: to pause between words (that is, to say nothing) or to use the cmavo “.y.” (of selma'o Y) . This resembles in sound the English hesitation noise written “uh” (or “er”) , but differs from it in the requirement for pauses before and after. Unlike a long pause, it cannot be mistaken for having nothing more to say: it holds the floor for the speaker. Since vowel length is not significant in Lojban, the “y” sound can be dragged out for as long as necessary. ”
