Di is also the form used as an emphatic pronoun after corso dy ( “ your” ) in possessive and infinitive contexts. ( hoepli 1) word- forming element of greek origin meaning " two, double, twice, twofold, " from greek di-, shortened form of dis " twice, " which is related to duo " two" and cognate with bi-, from corso di brasiliano 1 hoepli pdf pie root * dwo- " two. " in chemistry it indicates a compound containing two units of the element or radical to which it is prefixed. donor insemination collins english dictionary. detective inspector 3. copyright © harpercollins. pdf di in british english abbreviation for 1. defence intelligence 2. the form di is used after verb forms ending with a vowel ( namely the simple brasiliano future tense), while ti is used after other verb forms which end in - t.