(something which approximately has) the abstract shape of the symbol for the previous construct
Best used for letteral/numeral/etc. symbols; control their realization by specifying the script and the font, etc. Quite like bu. This is how one says "block O", where "O" is the symbol (approximately a circle, in this case) modified by a font face which is blocky; a "C"-shaped thing is given by "ro'au'o cy tai'u" or, equivalently in most font faces, "ru'o sy tai'u".