A suggestion made together with another person, or a suggestion that is jointly proposed by multiple people.
From Latin 'co-' meaning 'together' combined with 'suggestion' from Latin 'suggestio', derived from 'suggerere' meaning 'to bring up or propose'. The compound emerged in formal and academic contexts.
In academic and creative fields, 'cosuggestion' appears in formal proposals and collaborative writing, though it's relatively rare—most people just say 'joint suggestion' or 'mutual proposal' instead.
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