adjective (a)

• uncomfortably or inconveniently small(adj.all)

  Example:
  Incommodious hotel accommodations.
  

  Antonym:
  commodious, convenient
  

  source: wordnet30
• Tending to incommode; not commodious; not affording ease or advantage; unsuitable; giving trouble; inconvenient; annoying; as, an incommodious seat; an incommodious arrangement.(adjective)

  source: webster1913