platform; terrace; flat-roofed building
平 · 5 strokes
Depicts using a staff (丂) for striking. Based on the original meaning "to strike", now written as 抨. The meaning later shifted to "level", "even", and "flat".
台 · 5 strokes
Originally 台 and 㠯 were pronounced the same and thus written the same. Later 口 was added to distinguish the characters.