fruitless , adj : Bearing no fruit; barren. (figuratively) Unproductive, useless. (figuratively, archaic) Of a person: unable to have children; barren, infertile. (rare) Of a diet, etc.: without fruit.
Cibo e viaggi / Food and travel notes by Livio Acerbo

fruitless , adj : Bearing no fruit; barren. (figuratively) Unproductive, useless. (figuratively, archaic) Of a person: unable to have children; barren, infertile. (rare) Of a diet, etc.: without fruit.