Where does “stif-filio” come from?
stif-filio (Ido) comes from Ido filio, from Esperanto filo, from Latin fīlius, from Old Latin fīlios, from Proto-Indo-European dʰeh₁y-li-os, from Proto-Indo-European dʰeh₁(y)- — to suckle, nurse.
stif-filio (Ido): stepchild
Ancestry of “stif-filio”, step by step