lignify

• POS: Verb (usu participle)
• HYPHEN: lig=ni=fy

CIDE DICTIONARY

lignify, v. t. [L. lignum wood + -fy: cf. F. lignifier.].

 To convert into wood or into a ligneous substance.  [1913 Webster]

lignify, v. i. 

 To become wood.  [1913 Webster]

OXFORD DICTIONARY

lignify, v.tr. & intr. (-ies, -ied) Bot. make or become woody by the deposition of lignin.