The right sign for pillar depends on what sort of pillar you are talking about.
Often you can just use the sign for "support" to mean a "pillar" -- if the pillar you are talking about is used to support or hold something up.
See: SUPPORT
PILLAR (Version: large vertical cylinder, imposing tree trunk)
Notes: My rather serious facial expression has to do with conveying the idea of something massive and imposing. This isn't the same as the "CHA!" mouth morpheme which means "very large." I'm not simply implying "largeness" here but rather I'm also implying solidity and sturdiness.
PILLAR (Version: Smaller vertical cylinder, support beam, smaller tree trunk)
Notes: In this version I hold my hands closer together and I use a mouth morpheme that indicates "smallness."
