English edit

Etymology edit

From length +‎ -some.

Adjective edit

lengthsome (comparative more lengthsome, superlative most lengthsome)

  1. Of significant length; long; lengthy.
    • 1869, The New Eclectic Magazine, volume 5, page 341:
      [] and of course I planned a number of schemes for making it, when the time should come, duly effective and elegant. I pined to learn something of her during the lengthsome days of absence.