Thesaurus

(adj) : of plants, especially trees, that do not shed their leaves seasonally; continually fresh or self-renewing; often used metaphorically

(n) : a tree or shrub that does not shed its leaves or needles seasonally; more specifically, a conifer tree (e.g. pine, fir, cedar.)

(v) : to extend the term of a patent beyond the normal legal limit, usually through repeated small modifications; to set the repayment rate of a loan at or below the interest rate, so low that the principal will never be repaid