Definition of "inherent"

There is a stern melancholy in his dark features, inherent and engrossing, which rivets the attention.

1837, L[etitia] E[lizabeth] L[andon], Ethel Churchill: Or, The Two Brides. […], volume I, London: Henry Colburn, […], pages 244–245

One of the hidden glories of Victorian engineering is proper drains. […] But out of sight is out of mind. And that, together with the inherent yuckiness of the subject, means that many old sewers have been neglected and are in dire need of repair.

2014 June 14, “It's a gas”, in The Economist, volume 411, number 8891