Patakar
From Tolkien Gateway
The word patakar is a 'Quenyarized' word composed by the sounds /p/, /t/, /k/ and refers to voiceless stops. These are the basic glyphs of the Tengwar (Parma, Tinco, Calma along with Quessë) and are the heads of each 'series'.
The series are named tincotéma, parmatéma, calmatéma, and quessetéma, respectively (téma means "series" in Quenya).