underfermenting

Verb

underferment (third-person singular simple present underferments, present participle underfermenting, simple past and past participle underfermented)

1. (ambitransitive) To ferment insufficiently.
   • To obtain a raw, rasping and pungent flavor I am compelled to underferment, the indication of which is that the colour of infused leaves are of a greenish brown tint.1882, The tea cyclopædia. Articles on tea, tea science [&c.].