connatural

1. Innate; inborn.
2. Related or similar in nature; cognate.

[Medieval Latin connātūrālis : Latin com-, com- + Latin nātūrālis, by birth; see natural.]

adjective

1. Forming an essential element, as arising from the basic structure of an individual: built-in, congenital, constitutional, elemental, inborn, inbred, indigenous, indwelling, ingrained, inherent, innate, intrinsic, native, natural. See be, native/foreign, start/end.
2. Connected by or as if by kinship or common origin: agnate, akin, allied, cognate, connate, consanguine, consanguineous, kindred, related. See kin.

The adjective has 2 meanings:

Meaning #1: similar in nature

Meaning #2: normally existing at birth
  Synonyms: inborn, inbred, native