Okrand's words:
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There's no noun Maltz is aware of like "miniature" (small model or
version of something).
No root word, that is. A miniature model could always be described as a velqa'Hom or a figurine as a raghghanHom, and now we can say nu'wI' for something tiny. "Fun size" chocolate bars might be called yuch nu'wI'mey.
~mIp'av