The committee erred by approving the plan without consulting the engineers.

She erred when she dismissed his concerns, and later apologized.

I was going to, er, tell you about the meeting tomorrow.

She often er when speaking, especially under pressure.

In his paper on Old English morphology, he noted that the obsolete plural suffix -er once formed the plurals of a handful of nouns.

When you add -er to 'London', you form the word 'Londoner' to denote a resident of that city.

In many words, adding -er to a verb turns it into someone who performs the action.

When forming nouns, adding the suffix -er often creates a word that refers to a person or thing connected with an action, such as teacher or runner.

Linguists often point out the -er suffix in dialects, which turns verbs into adjectives to indicate aptitude or a tendency toward an action.

They began calling him Oliver-er after his father, and the nickname stuck.