Adverb
By design; purposely; intentionally; -- opposed to accidentally, ignorantly, or inadvertently.
Source: Webster's dictionaryI cannot persuade myself that a beneficent and omnipotent God would have designedly created parasitic wasps with the express intention of their feeding within the living bodies of Caterpillars. Charles Darwin
Things alter for the worse spontaneously, if they be not altered for the better designedly. Francis Bacon
She will never learn the most necessary, most difficult and principal thing in music, that is time, because from childhood she has designedly cultivated the habit of ignoring the beat. Wolfgang Amadeus Mozart
he used that word intentionally Source: Internet
I did this by choice Source: Internet