subfrigidus

suf-frīgĭdus ( subf- ), a, um, adj., rather cold or frigid (post-class. and very rare);

trop.: argumentum,

Amm. 17, 11, 4. — Adv.: suffrīgĭdē, rather coldly or frigidly:

nimis minute ac prope etiam suffrigide,

Gell. 2, 9, 4.