undercast

From Middle English undercasten, equivalent to under- +‎ cast.

undercast (countable and uncountable, plural undercasts)

1. (meteorology) An unbroken or nearly unbroken cloud layer below the point of observation.

   Antonym: overcast

   Undercast is common on Mount Washington.

2. (mining) An air-passage crossing a road in a mine by means of an airtight box or channel beneath it.

undercast (third-person singular simple present undercasts, present participle undercasting, simple past and past participle undercast)

1. To allocate the parts in (a play or film) to insufficiently skilled actors.
2. To throw under or beneath.

• Noun: Dictionary.com
• Verb: Concise Oxford English Dictionary Version 1.0

• reducants, tranduces, transduce, underacts, unredacts