These three conjugations are supplemented with three further derived stems, produced by the preformative -הת "hiṯ-" or -את "eṯ-". The loss of the initial ה "h" sound occurs similarly to that in the form above. These three derived stems are the Gt-stem, התפעל Hiṯpə‘el or אתפעל Eṯpə‘el (also written Hithpe‘el or Ethpe‘el), the Dt-stem, התפעּל Hiṯpa‘‘al or אתפעּל Eṯpa‘‘al (also written Hithpa‘‘al or Ethpa‘‘al), and the Ct-stem, התהפעל Hiṯhap̄‘al, אתּפעל Ettap̄‘al, השתפעל Hištap̄‘al or אשתפעל Eštap̄‘al (also written Hithhaph‘al, Ettaph‘al, Hishtaph‘al or Eshtaph‘al). Their meaning is usually reflexive, but later became passive. However, as with other stems, actual meaning differs from verb to verb.