number of morphemes in "liver"

cranberry-morphemes morphemes

Liver, tiger and river are one morpheme each.

As per comments:

Liver, tiger, and river are all one morpheme each, inseparable morphologically. And not all root morphemes occur as free morphemes; many are "cranberry morphs" that only occur in compounds or with other morphology, like the cran part of cranberry. - John Lawler

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