to

Multiple Entries:
  to    dare  

Concise Oxford English Dictionary © 2008 Oxford University Press:
to/tə/

▶preposition

• 1 expressing direction or position in relation to a location, point, or condition.

  ■ chiefly Brit. (in telling the time) before (the hour specified).

• 2 identifying the person or thing affected.

• 3 identifying a relationship between one person or thing and another.

  ■ indicating a rate of return: ten miles to the gallon.

• 4 indicating that two things are attached.

• 5 governing a phrase expressing someone's reaction: to her astonishment, he smiled.

• 6 used to introduce the second element in a comparison.

• 7 placed before a debit entry in accounting.

▶infinitive marker

• 1 used with the base form of a verb to indicate that the verb is in the infinitive.

  ■ (about to) forming a future tense with reference to the immediate future.

• 2 used without a verb following when the missing verb is clearly understood: she said she didn't want to.

▶adverb so as to be closed or nearly closed.

– origin OE tō (adv. and prep.), of W. Gmc origin.

Concise Oxford English Dictionary © 2008 Oxford University Press:
dare/deə(r)/

▶verb (3rd sing. present usu. dare before an expressed or implied infinitive without to)

• 1 have the courage to do something.

• 2 defy or challenge (someone) to do something.

• 3 literary take the risk of.

▶noun a challenge, especially to prove courage.

– phrases
how dare you used to express indignation.
I dare say (or daresay) it is probable.

– derivatives
darer noun.

– origin OE durran, of Gmc origin.