buyed

The word "buyed" is a non-standard past tense and past participle form of the verb "buy." The correct standard English forms are "bought." While "buyed" is occasionally encountered in informal contexts, particularly in casual speech or in the writings of those whose primary language is not English, it is generally considered grammatically incorrect in formal writing and standard English.

The evolution of English has seen many irregular verbs, like "buy," retain their unique past tense forms. For example, other verbs that follow a similar pattern include "teach" (taught), "catch" (caught), and "bring" (brought). The tendency for these irregular verbs to maintain their historical forms is a common characteristic of the language.

The use of "buyed" can sometimes be attributed to an analogy with regular verbs, which form their past tense by adding "-ed" to the base form (e.g., "walk" becomes "walked," "play" becomes "played"). Speakers or writers may incorrectly apply this regular verb pattern to irregular verbs.

In summary, while "buyed" might be understood in some informal settings, the universally accepted and grammatically correct forms are "bought" for both the simple past tense and the past participle. Adherence to standard English grammar dictates the use of "bought."