UPHILL
acclivitous, rising, uphill
(adjective) sloping upward
uphill
(adverb) upward on a hill or incline; “this street lay uphill”
uphill
(adverb) against difficulties; “she was talking uphill”
uphill
(noun) the upward slope of a hill
Source: WordNet® 3.1
Etymology
Adverb
uphill (comparative more uphill, superlative most uphill)
Up a slope, towards higher ground.
(by extension) With difficulty.
Antonyms
• downhill
Adjective
uphill (comparative further uphill, superlative furthest uphill)
Located up a slope or on a hill.
Going up a slope or a hill.
(by extension) Difficult or laborious.
Usage notes
• Sense 3 comparative and superlative is usually made with more and most
Antonyms
• downhill
Noun
uphill (plural uphills)
An uphill route.
Antonyms
• downhill
Source: Wiktionary
Up*hill", adv.
Definition: Upwards on, or as on, a hillside; as, to walk uphill.
Up"hill`, a.
1. Ascending; going up; as, an uphill road.
2. Attended with labor; difficult; as, uphill work.
Source: Webster’s Unabridged Dictionary 1913 Edition