autochthonous (adj.)

• abecedarian
• aboriginal
• ancestral
• antenatal
• atavistic
• beginning
• budding
• creative
• elemental
• elementary
• embryonic
• endemic
• fetal
• formative
• fundamental
• homegrown
• inaugural
• inceptive
• inchoate
• inchoative
• incipient
• indigenous
• infantile
• initial
• initiative
• initiatory
• introductory
• inventive
• nascent
• natal
• native
• native-born
• original
• parturient
• patriarchal
• postnatal
• pregnant
• prehistoric
• prenatal
• primal
• primary
• prime
• primeval
• primitive
• primordial
• pristine
• procreative
• rudimentary
• ur
• vernacular