Baretti: A dictionary of the English and Italian languages
Spiegá-re, v. a.
1. to unfold, open, stretch, display.— una rete, to open a net. — l'ale, to expand, spread the wings. — l'insegne, to display the colours, hoist the standard. — le schiere, (mil. t.) to extend the line or front, to deploy; 2. to explain, expound, interpret.— un dubbio, to explain a doubt. — bottega,to set up a shop. — le vele, to set the sails;v. r. to open, unfold one's self, declare one's opinion; s. m. Spiegá-tóre, f. Spiegá-tríce; adj. Spiegá-nte.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English
spiegare: to display, to vnfold, to spread abroad. Also to explaine or expound.