noun
Refers to a person passing by on foot, often in contexts like traffic, streets, or public spaces. Similar to 通行人, but 通行者 can sound slightly more formal or official.
See also: 通行人
この道は通行者が多いので、自転車は注意が必要だ。
There are many pedestrians on this road, so cyclists need to be careful.
事故の目撃者を探すため、警察は通行者に聞き込みを行った。
The police questioned passersby to find witnesses to the accident.
Compound of 通行 (passage, traffic) and 者 (person). The exact historical derivation is straightforward; the word follows a common pattern for forming agent nouns.