adv. , adj. /up"hil"/ ; n. /up"hil'/ , adv.
1. up or as if up the slope of a hill or other incline; upward: The soldiers marched uphill. Water does not run uphill without assistance.
adj.
2. going or tending upward on or as if on a hill: an uphill road.
3. at a high place or point: an uphill village.
4. laboriously fatiguing or difficult: an uphill struggle to become wealthy.
n.
5. a rising terrain; ascent.
[ 1540-50; UP- + HILL ]
Syn. 4. arduous, hard, strenuous, taxing, grueling.