mettessero
Mettessero is the third-person plural form of the Italian verb mettere in the congiuntivo imperfetto (imperfect subjunctive). It is used in dependent clauses after verbs of doubt, possibility, desire, emotion, or judgment, and appears in more formal or literary writing as well as in reported speech. The form signals a hypothetical or non-real action in the past or a potential action in a past- or present-time frame.
The imperfect subjunctive forms of mettere are used to express nuance in dependent clauses, typically following
Usage notes: The congiuntivo imperfetto, including mettessero, is more common in formal, literary, or historical contexts.
See also: Mettere, Italian verbs, Congiuntivo imperfetto, Italian grammar.