ADD TO

添　テン、そ（える）、そ（う）

JY f1354 11strokes 529
COMPOUNDS
Add to, append, affix, accompany
添加する・てんかする・add, annex
添付する・てんぷする・attach, append, annex
添削・てんさく・correction
Accompany, go along with, attend on
添乗員・てんじょういん・courier, tour conductor
KUN
添える・そえる・add to, attach, accompany, garnish
添え物・そえもの・addition, supplement, garnish
添え書き・そえがき・postscript, additional writing
介添え・かいぞえ・helper, assistant, best man
Accompany, go along with, stay with
添い寝・そいね・sleeping with (ones child)
付き添い・つきそい・attendent, escort

“water” plus “man with bowed head” and ashamed feelings (associated with heart character) Semantic meaning of right part is unclear, but acts phonetically to mean fill – hence meaning was to fill with water but then add or append in broader sense – “man with bowed head ADDs water TO (something)”