Definition from Wiktionary, the free dictionary
Conjugation of the Portuguese -ir verb exprimir
From Latin exprimere, present active infinitive of exprimō. Was originally inherited (in its Old Spanish form espremir) and later modified in spelling to reflect the Latin etymology. Compare also the doublet expremir, rarely used today.
1 Argentine and Uruguayan voseo prefers the tú form for the present subjunctive.