開

unsealed mail

day of blooming

Mathematics

extraction of roots; evolution

grand opening

underdeveloped country; half-civilized country; half-civilised country

aperture ratio

dehiscence; cleavage; fission

first opening of warehouse after New Year

opening the winter hearth

Surgery

craniotomy

bascule bridge; drawbridge

ballot-counting place

long "o" vowel arising from combination of the "a" and "u" sounds

opening of a hot spring or bathhouse

first day of cherry blossoms reaching full bloom; first day in which at least 80% of the somei yoshino cherry blossom has opened (in a specific region or place)

development bank

opening (a letter); unsealing

open ditch; open channel; open conduit; open culvert

publicly traded stock; stock listed on the stock exchange

first lighting of the hearth in a Zen temple (first day of the 10th or 11th month)

open circuit

resumption; continuing

mechanical device for opening and closing (shutters, gates, etc.)

Rare term

(railway) crossing gate; barrier

split and dried saurel