lignify

From Latin līgnum (“wood”) +‎ -ify.

• IPA^(key): /ˈlɪɡnɪfaɪ/

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lignify (third-person singular simple present lignifies, present participle lignifying, simple past and past participle lignified)

1. (intransitive) To become wood.
2. (intransitive, botany) To develop woody tissue as a result of incrustation of lignin during secondary growth.
3. (intransitive, by extension) To become rigid or fixed, like something made of wood.
4. (transitive) To turn into wood; to make ligneous.

• lignification