Sentence:  [S]in and sorrow it were, considering the hardships of this noble and gallant knight, no whit mentioning or weighing those we ourselves have endured, if we were now either to <WSD>advance</WSD> or retard the hour of refection beyond the time when the viands are fit to be set before us. 
Meaning of the word marked with <WSD> tags:  To make (something) happen at an earlier time or date; to bring forward, to hasten. (form 15th c.)