Morphemes
A morpheme is a recurring form associated with a function or meaning. A root or stem carries a lexical base; affixes attach before, after or within it. A word need not divide neatly into one piece per meaning: some categories are expressed by tone, vowel change or reduplication. To propose a boundary, compare multiple forms in the same language and period, not only a familiar-looking sequence in one word.
Beyond suffixes
WALS gives Indonesian rumah “house” and rumah-rumah “houses”, where copying the stem marks plurality. In Ngiti, kamà “chief” and kámá “chiefs” differ in tone. These modern examples show why a paradigm may have no segmentable plural suffix. In Fijian, WALS treats the past marker aa as an independent phonological word while another marker attaches to a verb: even one language can use different morphological strategies.
Segmentation
A useful working analysis records the whole attested form first, then a proposed segmentation, then a gloss for each part. Keep the segmentation revisable. A repeated ending may reflect case, number, a stem class, or a phonological alternation. A single form rarely decides among these possibilities.
Modern-language examples on this page clarify a linguistic pattern. They do not establish unattested sounds or forms for an ancient language. Follow the cited sources below and keep editorial readings separate from the surviving trace.