一雨: a single rainfall; a single brief rain shower

a single rainfall / a single brief rain shower

all together / all at once, simultaneously

simultaneous

hypothetical and imperative forms of 咲く (saku) [godan]

to bloom / to make white waves appear

a flower / Short for 生け花 (ikebana): flower arrangement / Short for 花札 (hanafuda): Japanese playing cards / the best days of one's life / the best thing / essence

天の下: the whole world, under heaven; the people of the country or nation; the imperial court; the administration, the government; all of Japan

天が下: the whole world, under heaven; the people of the country or nation; the imperial court; the administration, the government; all of Japan

threatening sky, signs of rain, looking like rain / rainy weather