Unripe or green (not fully matured), especially of fruit or crops.
未熟な桃はまだ硬くて酸っぱい。
An unripe peach is still hard and sour.
その果物は未熟で食べられない。
That fruit is unripe and cannot be eaten.
未熟な果実は収穫前に落ちやすい。
Unripe fruit tends to fall before harvest.
Immature; inexperienced; lacking skill or experience (used for people or abilities).
彼はまだ未熟だが、やる気はある。
He is still inexperienced, but he has motivation.
未熟な新人がミスを繰り返した。
The inexperienced new employee repeated mistakes.
経験を積めば未熟さは次第に減る。
With experience, immaturity gradually decreases.