In Tale of Two Cities, Book 2 Chapter VI Hundreds of People, there is one word, 'render', which confuses me.
Mr. Lorry knew Miss Pross to be very jealous, but he also knew her by this time to be, beneath the service of her eccentricity, one of those unselfish creatures — found only among women — who will, for pure love and admiration, bind themselves willing slaves, to youth when they have lost it, to beauty that they never had, to accomplishments that they were never fortunate enough to gain, to bright hopes that never shone upon their own sombre lives. He knew enough of the world to know that there is nothing in it better than the faithful service of the heart; so rendered and so free from any mercenary taint...
What does 'render' mean here?