Is -ward an adjective suffix

Answer 1

Words ending in -ward are most commonly adjectives and adverbs, and sometimes a noun. Some examples are:

• awkward; adjective (an awkward situation)
• backward; adjective (a backward glance); adverb (faced backward)
• coward; noun (the coward ran away)
• downward; adjective (a downward path); adverb (slipping downward)
• leeward; noun (steered to the leeward); adjective (the leeward side); adverb (flew leeward)
• wayward; adjective (a wayward son)

Answer 2

It can be, as it changes nouns or prepositions into modfiers (adjectives or adverbs). The suffix means "in the direction of" and some words can be either adjectives or adverbs.

Examples

sea -> seaward (to the side nearest the sea)

back -> backward (in a reverse or retrograde direction)

way -> wayward (in one's own chosen direction)

down -> downward (toward a lower point)

after -> afterward (after, in time or sequence)