A person who tunes musical instruments, especially stringed instruments.
From accord (via French accorder 'to tune') plus -er (a suffix forming nouns meaning 'one who does'). The word evolved from the sense of 'bringing into accord' to mean someone who professionally does this tuning.
In the 18th and 19th centuries, piano accorders were skilled craftspeople who were almost as important as builders—a well-tuned piano could make a mediocre performer sound decent, but a poorly tuned one ruined everything.
The -er suffix historically defaults masculine; as a role noun (one who accords or tunes), it lacks gender-neutral standardization.
Use 'person who accords/tunes' or specify role; if used, pair with pronouns or identifiers.
["tuner","person who accords","accordionist"]
Complete word intelligence in one call. Free tier — 50 lookups/day.