英和和英

to open hostilities―commence hostile operations

to begin a dispute―open hostilities

to open fire

to make a beginning

to make a beginning―pave the way for something

to extract the cubic root of a quantity

to open a steamship service

There will be no justification of a war

to cut one's way through the enemy

to hear a case―The court sits on a case

to extract the square root of a quantity

to keep a gambling house

to extract the square root （of a number）

open the gate

to expand the chest

to open the gate

to clear waste land―reclaim waste land

to make canal through―canalize―a country

Open the screen

to declare war―proclaim war

give a recital

to break the seal―（みだりに開封するの意味なら）―tamper with the seal

break [open] the circuit

undo the parcel

The curtain rises

to hold a court

to open one's mouth wide―gape

to turn on the fire-plug

to open a fan

to open a window―let up a window