@Choco_Pudding
Using ellipses to indicate cut off (or in this case more of a just 'faltering off') speech is commonplace enough now that I think it gets a pass. Using hyphens may be a little too abrupt of an ending and would indicate that Kyuu noms on it aggressively, which may not be the case (hard to tell with just 4 frames).
Removing the 'z', I think, causes much of the same thing. the final 'e' in 'freeze' is not necessarily silent for all speakers, and thinking about it now Hinata may be either cutting himself off (going silent) or else dragging out the last syllable (kind of like an elongated 's'), depending on non-existent context, so having the 'z' at least ensures that the meaning of the word isn't entirely lost.
Either way, words are weird.