含み

1. Origins, structure, and basic meaning

• Structure: 含み (ふくみ) is a noun for an implication or latent possibility left unstated in words or conduct.
• Basic usage: 交渉の含みがある leaves room for continued negotiation in a reply, while 皮肉の含みがある suggests an undercurrent of sarcasm in wording.

2. Common pitfalls and similar expressions

• Reserved possibility and implied attitude
  • 交渉の含み concerns a future option, whereas 皮肉の含み concerns evaluative subtext. Neither is the physical containment of a substance.