Compounds of 失礼

• 失礼
  (n,vs,adj-na) (1) discourtesy
  impoliteness
  (exp) (2) Excuse me
  Goodbye
  (vs) (3) to leave
  (vs) (4) to be rude
  (P)
• 失礼至極
  (adj-na) extremely rude (impertinent, impolite)
• 失礼千万
  (adj-na) extremely rude (impertinent, impolite)
• 失礼します
  (n) excuse me
• 失礼しました
  (n) excuse me
  I'm sorry
• お先に失礼します
  (exp) pardon me for leaving (first) (used when leaving a workplace while others remain)