Word family
A word family is the base form of a word plus its inflected forms made with affixes.[1]
The idea is that a base word and its inflected forms support the same core meaning. A learner needs to understand both the base word and the affix.
References
- Bauer, L; Nation, P (1993), "Word Families" (PDF), International Journal of Lexicography, 6 (4): 253–279, doi:10.1093/ijl/6.4.253 (abstract)