the.com/morpheme

The smallest piece of meaning language can legally cut into.

means A morpheme is the smallest unit of a word that still carries its own meaning or grammatical job — like 'un-', 'break', and '-able' inside 'unbreakable'.

from Coined by linguists in the early 20th century (the term is usually credited to Polish linguist Baudouin de Courtenay and his successors, popularized through the structuralist tradition) by taking Greek 'morphē,' meaning 'form' or 'shape,' and bolting on the scientific suffix '-eme,' the same one used in 'phoneme,' meaning 'a basic distinctive unit.' So literally: the smallest shaped unit of a system — built to sit alongside phoneme as its meaning-side twin.

not a syllable
sound units; morphemes are meaning units
example
unbreakable has three: un, break, able
bound vs free
cat stands alone, un never does
zero morpheme
sheep plural adds meaning but no letters
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