What is a synonym for "fruitless"?

Common synonyms include: unproductive, abortive, acarpous, arid, barren, barren.

Fruitless

//ˈfɹuːtləs// adj

adj ·Moderate ·High school level

Adjective

1
Bearing no fruit; barren.
"[S]he [Rachel Carson] also warned of falls in which "there was no pollination and there would be no fruit." […] The entomologist Stephen L. Buchmann and the crop ecologist Gary Paul Nabhan amplified Carson's warning in their 1996 book, The Forgotten Pollinators. They predicted fruitless falls unless our land-use patterns changed fast. But few people paid attention."
2
Unproductive, useless. figuratively
"The unskilled man’s attempt at fixing his car engine was fruitless."
3
Of a person: unable to have children; barren, infertile. archaic, figuratively
"The fruitless woman desperately wanted to have children."
4
Of a diet, etc.: without fruit. rare
"The first fruits of the season were eagerly sought after, and everybody was thankful that once more dread winter with its unvarying monotony of fruitless meals was a thing of the past."