research association; research society / group of enthusiasts (as may be found in schools, colleges, etc)

research & development; R&D

(education) research project, done by Japanese schoolchildren during summer break, to be presented upon return to school

七七日: the forty-ninth day after a person dies; the Buddhist memorial service that occurs forty-nine days after a person dies

乳: milk; breast; latex (milky substance in plants) / 父: one's own father; a father figure; the Christian God / 致知: the pursuit of knowledge; / 遅遅, 遅々: slowness, tardiness; a long day

遅遅, 遅々: to be late

乳, 父: a surname / 父子: a place name

日日: day by day

日日: every day, daily

(onomatopoeia, slang) sexy