合

trypophobia (fear of irregular patterns or clusters of small holes)

to join together (wooden boards, etc.); to patch together (pieces of cloth, etc.); to glue together

(crime of) assembling with dangerous weapons

to bind together (e.g. the pages of a book); to sew up; to tape together; to stitch together

Word usually written using kana alone; Colloquial

to be mixed up with; to have a connection with (a troublesome matter)

to be a stickler about; to be finicky about (some triviality)

to take part (in some work); to hang about; to bother (someone)

immediate neighborhood; immediate neighbourhood

to engage in (mutual) competition

union card

Mathematics

finite set

Organization name

International Union for Conservation of Nature and Natural Resources; IUCN

teachers' union

United Nations Charter

synthetic detergent

Computing

link set

peace accord; peace agreement

Mathematics

power set

producer's association

total fertility rate; TFR

closing one's eyes and joining one's hands together in prayer

metallic bond

Liberal League (Japanese political party, 1994-2005)

Organization name

National Institute of Advanced Industrial Science and Technology; NAIST

Hanafuda

hana-awase (type of hanafuda game)

Dated term; Hanafuda

any hanafuda game involving matching cards from one's hand with cards of the same suit in the field (such as hachi-hachi, koi-koi)

flower-comparing contest (Heian period)

banning (e.g. an organization); making something illegal