[hah-chek] 
| a diacritical mark (ˇ) placed over a letter in some languages, as Czech and Lithuanian, and in some systems of phonetic transcription, esp. to indicate that a sound is palatalized. |
| ha·ček (hä'chěk') n. A diacritical mark (ˇ) that resembles an inverted circumflex and is used over certain letters, such as č, to indicate quality of pronunciation. [Czech háček, diminutive of hák, hook, from Middle High German hāken, from Old High German hāko; see keg- in Indo-European roots.] |
tʃɛk