What Hebrew word means the long, unbroken shofar blast?

The Hebrew word for the long, unbroken shofar blast is Tekiah.

A tekiah is a single, sustained note made by blowing into a shofar, the horn traditionally used in Jewish ritual. Its steady sound contrasts with the broken patterns of shevarim and teruah. On Rosh Hashanah, the tekiah normally appears at the beginning and end of a sequence.

The shofar-blowing tradition developed from biblical commands to sound a horn on the first day of the seventh month. Rabbinic interpretation organized the sounds into repeated patterns, including tekiah-shevarim-teruah-tekiah, tekiah-shevarim-tekiah, and tekiah-teruah-tekiah.

A common mix-up is confusing tekiah with tekiah gedolah. The latter means “great tekiah” and is an especially extended final blast, while tekiah is the standard name for the sustained sound. The related term shevarim means three connected, shorter notes, and teruah usually refers to a rapid series of staccato notes.