What does it mean to characterize a language as uninflected?

Characterizing a language as uninflected means that the grammatical relationships between words are not indicated through the modification of their endings. In uninflected languages, words typically maintain a consistent form regardless of their grammatical function in a sentence, and meaning is more reliant on word order and context rather than morphological changes. This contrasts with highly inflected languages, where endings of words change to convey different grammatical details like tense, number, or case.

Choosing this answer highlights an essential aspect of language structure where the form of a word does not change to reflect its grammatical role, thus simplifying certain aspects of language learning and usage.