Definition of "wittingly"

And an act hath three branches—it is to act, to do, to perform. Argal, she drowned herself wittingly.

c. 1599–1602 (date written), William Shakespeare, “The Tragedie of Hamlet, Prince of Denmarke”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene i], lines 11-13