plump, thick, big around
太 centers on largeness of girth or thickness: something plump, thick, or big around. It describes physical bulk rather than general size.
太 is derived from 大 (big) with an added dot to emphasize thickness or plumpness. The dot likely served as a distinguishing mark to differentiate it from 大.
Picture a large person 大 with a big belly, and the dot inside is the belly button. That extra dot makes the person plump and thick.
For タイ, imagine a thick tie wrapped around a plump waist: tie -> タイ, and the tie emphasizes the thickness.
Sun
to put on weight; to gain weight; to grow fat; to get stout
fat; thick
Pacific Ocean
drum
thigh
crown prince
long sword (as opposed to the shorter katana)
Pacific War (1941-1945)
solar system
log
ancient times; prehistoric times
crown prince
boldface; bold-type; thick characters
generous; magnanimous; big-hearted; broad-minded; big-bellied
Empress Dowager; Queen Mother
gidayū (type of reciting used in the puppet theater)
unemployed person; vagabond; floater; vagrant
corpulent; fat; chubby
solar cell
crown princess