Our Proto-Indo-European root today is *dʰeiǵʰ- "to build, to form". In Old English it became daȝ "dough", *diȝ "knead", and dǣȝe "bread kneader, female (farm) servant, dairy-woman". Hlāf "bread, loaf" plus *diȝ equals hlǣfdiȝe "mistress of a household", becoming Middle English lafdi, then lady. dǣȝe became Modern English dairy.
The zero-grade form with a nasal infix *dʰi-n-ǵʰ- became Latin fingere "to shape", past participle fictus, which gives us fiction.
In Avestan, the suffixed o-grade from *dʰoiǵʰ-o- became daēzō "wall", as in "something that is built". This combined with pairi "around" (from *per- "forward, through") to form pairidaēza "enclosure". This was borrowed into Greek as παράδεισος "enclosed park, pleasure ground", then into Latin as paradisus, and then thru Old French into English as paradise.