Antonyms of adj rewardful

1 sense of rewardful

Sense 1
rewardful -- (offering or productive of reward; "rewardful pursuits")

INDIRECT (VIA rewarding) -> unrewarding -- (not rewarding; not providing personal satisfaction)

Similarity of adj rewardful

1 sense of rewardful

Sense 1
rewardful -- (offering or productive of reward; "rewardful pursuits")
       => rewarding (vs. unrewarding) -- (providing personal satisfaction; "a rewarding career as a paramedic")