dually

• (UK) IPA^(key): /ˈdjuːəli/, [ˈdʒuː(ə)li]
• (US) IPA^(key): /ˈdu.əli/

From dual + -ly (forming adverbs from adjectives).

dually (not comparable)

1. In a dual manner; doubly

From dual + -y.

• duallie, dualie, dualy

dually (plural duallies)

1. (automotive) A pickup truck with four wheels on the rear axle.
   • 2011, Michael Levatino, Audrey Levatino, The Joy of Hobby Farming‎^[1], page 34:

     Whatever you do, don't buy a dually. A dually is a big, diesel truck with four wheels in the back that costs three figures to fill up.