unhappy

1. The utterance is performative, which is to say that it does something as opposed to simply sating something.  The most common example of a performative utterance is the phrase "I do" when spoken in the context of a marriage ceremony; but

2. The context for the speech act is wrong.  This can be due to purely circumstantial events (ie, saying "I do" outside the marriage ceremony will not result in marriage) or it can be due to the mindset of the speaker.  For example, an insane person who says "I do" during an otherwise appropriate marriage ceremony may not have the presence of mind to enter in to such an arrangement and will not be considered married.

Sources:

Austin, J.L.  How to Do Things With Words, 2nd ed.  1975: Harvard University Press.

Un*hap"py (?), a.

1.

Not happy or fortunate; unfortunate; unlucky; as, affairs have taken an unhappy turn.

2.

In a degree miserable or wretched; not happy; sad; sorrowful; as, children render their parents unhappy by misconduct.

3.

Marked by infelicity; evil; calamitous; as, an unhappy day.

Milton.

4.

Mischievous; wanton; wicked.

Shak.

-- Un*hap"pi*ly (#), adv. -- Un*hap"pi*ness, n.

© Webster 1913.