A person who bawls; someone who cries loudly or shouts.
From bawl + -er (agent noun suffix creating nouns for people who perform actions). The construction is straightforward: one who bawls. This pattern is productive in English, allowing us to create agent nouns for almost any verb.
The suffix -er is so powerful that you can call anyone who cries loudly a bawler, which might seem mean but shows how English lets us create insults on the fly! Spanish and German do the same thing—language loves turning verbs into people.
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