Daḍḍhi˚

making firm, strengthening, in; kayādaḍḍhi-bahula strengthened by gymnastics, an athlete Ja.iii.310 (variant reading daḷhi˚), Ja.iv.219 (variant reading distorted kādaḷiphahuna).

not with Trenckner, Notes p. 65 = Sk. dārḍhya, but with Kern,

Toevoegselen

113 = Sk. dṛḍhī (from dṛḍha, see daḷha), as in compound dṛḍhī karoti & bhavati to make or become strong