To treat with or extract dye from clavel plants, or to convert into a nail-like or clubbed form.
From 'clavel' + '-ize' (to make or become). A back-formation from the noun 'clavel' used in specialized textile and botanical contexts.
The verb 'clavelize' is so rare that it barely appears in modern texts, but it demonstrates how English loves taking nouns and turning them into verbs to describe specialized industrial or botanical processes.
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