Phonetic Complement
Sound signs can be used as sound complements (or phonetic complements) indicating the sound conveyed by other phonograms. In the sign, it is added to flesh out the r of pr and in the one-consonant sign and are used to flesh out fr of nfr. In , the is added to flesh out the r in Hr.
Sound complement can be added in three ways:
1. Before the phonograms
Many such cases are well documented in Old Kingdom texts. This phoneme was used in Middle Kingdom texts.
Example
tm (tsound complement + tmphonogram)
2. Sound Complement added after the phonograms
This usage is a common feature in the inscriptions of the Old and Middle Kingdoms.
Examples
pA (pA phonogram + A sound complement).
mn (mn phonogram + n sound complement).
3. Sound Complement added before and after the phonograms
This is a rare way in which Egyptians tried to flesh out consonants in bilateral or triliteral signs.
Example
in
(i sound complement + in phonogram + sound)