This is from the Spanish word firma.
pirma: signature
pirma: pangalang isinulat
pumirmá: affix a signature
pirmahán: to sign
pirmado (adjective): signed
Pirmahan mo ito.
Sign this.
Pirmahan mo ng pangalan mo.
Sign (it) with your name. (informal)
Pirmahan po ninyo.
Please sign. (polite)
Dito ka pumirma.
You sign here.
Pinirmahan ko na.
I’ve signed (it).
The native Tagalog word is lagda.
