ichidan verb, intransitive verb
be well-kneaded; become smooth through kneading
Intransitive; describes dough, clay, or similar substances becoming pliable and uniform through kneading.
パン生地がよく練れて、なめらかになった。
The bread dough was well-kneaded and became smooth.
ichidan verb, intransitive verb
be seasoned; be experienced; be mature and well-rounded
Intransitive; used for people, skills, or ideas that have been refined through experience or practice. Often implies a desirable depth or polish.
彼は長年の経験で、人間として練れてきた。
Through years of experience, he has matured as a person.
そのアイデアはまだ練れていない。
That idea hasn't been fully developed yet.