1.
barren, infertile (land)
Land that cannot support vegetation or crops due to poor soil or harsh conditions.
不毛の大地が広がっている。
Barren land stretches out before us.
砂漠は不毛な土地だ。
The desert is infertile land.
不毛な地を緑化する取り組みが進んでいる。
Efforts to green barren land are advancing.
2.
fruitless, futile, unproductive
An activity, discussion, or effort that produces no useful results. More commonly used than the literal sense.
不毛な議論はやめよう。
Let's stop this fruitless argument.
お互いを批判するだけの不毛な争いだ。
It's a futile conflict where both sides just criticize each other.
何時間も話し合ったが、結局不毛な結果に終わった。
We discussed it for hours, but it ended in a fruitless outcome.
不毛 is used both literally (infertile land) and figuratively (unproductive efforts). The figurative sense is more common in everyday usage.
COMMON COLLOCATIONS:
- 不毛な議論 (fruitless debate)
- 不毛な争い (futile conflict)
- 不毛な土地/大地 (barren land)
- 不毛の地 (barren ground)
ETYMOLOGY:
不 (not) + 毛 (hair, growth) — land where nothing grows.