circumflex

Short definition from Wiktionary

Noun

1. 1
   A diacritical mark (ˆ) placed over a vowel in the orthography or transliteration of many languages to change its pronunciation; while in some other languages over a consonant.

Adjective

1. 1
   Having a circumflex mark.
2. 2
   Curving around.

Verb

1. 1
   To mark or pronounce with a circumflex.
2. 2
   To arch.