annexed, accompany, marry, suit, meet, satisfy, attach, append, garnish, imitate
添 centers on adding something extra to complete or enhance: attaching, appending, or accompanying. The ideas of marrying, suiting, and satisfying extend from adding what is needed to make a whole.
添 combines 氵 (water) with 忝, which likely contributes the sound and the idea of adding or supplementing. The exact historical development of 忝 is uncertain.
Water 氵 is added to 忝, like pouring a little extra liquid to top off a dish. This act of adding completes the meal, just as 添 means to attach or accompany something to make it whole.
For テン, picture adding a tenth (ten) ingredient to a recipe: ten -> テン, and that extra touch garnishes the dish perfectly.
to garnish; to accompany (as a card does a gift)
attaching (documents, etc.); appending; affixing
addition; annexing
getting mixed up in; getting embroiled in; involvement; entanglement; by-blow
correction; looking over; touching up
attendance (on); chaperonage
sleeping together
to get close; to cuddle close together; to nestle close to; to snuggle up to
to meet (wishes, expectations, etc.); to satisfy; to comply with; to live up to
help; assistance; service
accompanying (on a trip); escorting (a tour group)
to attend on; to wait on; to accompany; to escort; to chaperone
helper (e.g. for a sick person); assistant
addition; supplement
recommendation; putting in a good word for someone
to remain married for life; to live as a married couple until death
vector subscript
superscript
subscript
second wife