to speak (to deliver a message to a group; to deliver a speech) [+ do (genitive) = to whom]
to speak up (to gain the ability speak)
to speak up (to begin speaking)
to put in a good word [+ za (instrumental) = for whom]
to speak to (to speak to someone in a particular manner) [+ do (genitive) = to whom]
to speak through (to appear in someone's behavior) [+ przez (accusative) = through whom]
to talk over to talk around [+ do (genitive) = to whom]
to speak for, to speak against (to attest to something's benefit or detriment) [+ za (instrumental) = for what], [+ przeciwko (dative) = against what]
to argue, to fight