from חָמַר; properly, a bubbling up, i.e. of water, a wave; of earth, mire or clay (cement); also a heap; hence, a chomer or dry measure; clay, heap, homer, mire, motion.
from an unused root meaning apparently to be sticky (rather perb. a demonstrative); from טוּא, through the idea of dirt to be swept away); mud or clay; figuratively, calamity; clay, dirt, mire.
from the root of בָּנָה through the meaning to build; a stone; [phrase] carbuncle, [phrase] mason, [phrase] plummet, (chalk-, hail-, head-, sling-) stone(-ny), (divers) weight(-s).
TRV