a metaphorical obstacle or divide, such as a trade or ideological barrier

fort; fortress; stronghold

to face off against one's adversary (military, sports etc)

army camp

home run (baseball)

(baseball) home base; home plate

home run (baseball)

sharply divided by rigid boundaries, clear distinctions, or ideological rifts

a building technique using compressed earth to construct walls, or a house built with this method

accumulative or additive in nature, often used in technical or mathematical contexts

running between bases in baseball

runner (in baseball)

Mori Kazakh Autonomous County in Changji Hui Autonomous Prefecture, Xinjiang

Mori Kazakh autonomous county in Changji Hui autonomous prefecture, Xinjiang

Hainan hopea (Hopea hainanensis)

to have one's defenses or fortifications completely renewed

pent-up resentment or grievances, often metaphorically described as a lump on the heart

Loikaw, capital of Kayah State, Myanmar

to build a structure out of layered bricks or stones

additive number theory (math.)

(computing) bastion host; jump server

in baseball, the first of the four bases that a runner must touch in succession.

(baseball) bases loaded

The swallow's nest is built one beakful of mud at a time; used as an idiom to describe how great things are achieved through persistent, small efforts or how many small things add up to a lot (many a little makes a mickle).

(baseball) to steal a base or the act of doing so (stolen base)