seinnid

Etymology
From a conflation of two verbs due to the Irish merger of word-initial *sw- and *s-.
 * The meaning "to play a musical instrument" derives from, ultimately from . The conjugation is derived entirely from *swannati; the labial consonants in the middle of the reduplicated preterite and future stems are regular, as medial -sw- generally lenited into them.
 * The meaning "to strike" is from, from . The expected preterite reduplication, *siann- ← *se-sann-, was supplanted by that of *swannati. However, the original formation survives in the fossilized defective verb (← dī-kom-sesanne).

Verb

 * 1) to play a musical instrument
 * 2) to strike