Different reports from Companions and Successors on rare Qur’anic vocabulary may arise because a word has several Arabic uses or because contextual indicators lead interpreters to emphasize different senses.
One exegete offers a common lexical meaning, another weighs neighboring sentences, and another supplies an explanatory paraphrase. Their statements should be evaluated according to what each is trying to establish.
Principle: after identifying possible senses, prefer the one best supported by Arabic usage, syntax, and the immediate context of the verse.