Frankly, listed meaning of TAKING A WIFE is rather vague, as it could refer to MARRIAGE, or, simply to schtupping (ejaculation into a birth canal or other attainable orifice) one's own wife, or, schtupping anybody's wife for that matter and in that regard, SEXUAL INTERCOURSE would thereby be the most appropriate definition. Overall meaning seems to be the MARRIAGE OF or TO A WOMAN, becoming the「lord's diva」as a「female tonguing mouth, rod in orifice」with「someone being stupid, confused, in a stupor, torpid, muddled.」…and the torpid person could be either party, or both of them. Combined, the elements could be the「day a woman's family joins the clan.」Right element of「clan, surname」with a「lowered sun」means「comatose, dizzy, confused, dusk, twilight, dark, sleeping」as if the Sun is setting below the clan's residence atop a hill and perhaps the marriage is being consummated. Perhaps it just means「female is giddy」due the excitement of marriage…? or because 'stupid is as stupid does' by CREEPING INTO A FEMALE'S BEDROOM TO FUCK HER. Top-right element of「clan surname」also may mean「nee」a woman's maiden surname prior to marriage and that family name is now joining the husband's clan, in part.
　CREEPING: vines do not possess the physical structure to permit standing alone, hence vines creep along the soil until an erect tree, wood (木) or woody is located, at which time the parasitic vine begins to wrap itself around the erect wood and climb with screwing, twisting vertical motions using the host for support, until ultimately the CREEPING VINE strangles the host wood to death by sapping most of the nutrients and water from the soil and the sunlight from the treetop for itself. These same attributes obviously could apply to a person with pulverized feet bones who has become a service provider, and to a client who has hired such services during a short-term rental but subsequently become hopelessly enamored: MARRIAGE.
　Marriage is a relatively recent institution in our species’ 300,000-plus-years of history, originating perhaps 5,000 years ago in Mesopotamia, and until quite recently served to bind women to men as property assets, to ensure paternity, and protect the male's lineage among descendants. That puts marriage at ~1–2% of the age of Homo sapiens.

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaningless mnemonics)
Chinese: to marry; marriage; wedding; to take a wife
Japanese: sexual intercourse, creeping at night into a woman's bedroom, stealing into a girl's bedroom at night to make love, sneaking visit
Unihan extended: get married; marriage, wedding
EDRDG: marriage