modality N1 rare writtenliterary
〜に足る — worthy of ~
〜に足る ・ にたる
A full written guide for 〜に足る is on the way.
This point is mapped in the grammar tree, but its examples, formation table and usage notes haven't been written yet. The fastest way to learn it now is to meet it in real sentences inside Jengo.
See 〜に足る in real sentences
Jengo shows 〜に足る the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.
Study it in JengoSources Compiled from published Japanese grammar references.