WHOLE CHARACTER
太
too; excessively (太长); very; extremely (太好); highest; grandest (太空, 太太); honorific in kinship titles (太太, 太夫人)
太 is too — too long, too good; it also marks the grandest, as in 太阳.
Taught as one complete written unit; the header calls the formation 指事 (大 with a mark for what is greatest).