деревянеть bedeutet auf Englisch

lignify [lignified, lignified, lignifying, lignifies]▼(to become wood)
verb
[UK: lˈɪɡnɪfˌaɪ lˈɪɡnɪfˌaɪd lˈɪɡnɪfˌaɪd] [US: lˈɪɡnᵻfˌaɪ lˈɪɡnᵻfˌaɪd lˈɪɡnᵻfˌaɪd]