δή

Etymology
From, from. See also.

Particle

 * 1) Adds temporal specificity: now, already
 * 2) Adds emphasis: truly, !, indeed, in truth
 * 3) Adds specificity: exactly
 * 4) Sometimes ironical: no doubt, of course
 * 5) With pronouns: of all people

Usage notes
is a post-positive word, meaning that it will usually (but not always) be the second word in a clause.

Conjunction

 * 1) but, and