The runner advanced to second base.
He succeeded in stealing a base.
Literary or historical term for a fortification. Often appears in compounds like 塁壁 (rampart) or 孤塁 (isolated fortress).
They captured the enemy fortress.
The soldiers built a rampart on the riverbank.
The runner is standing on first base.
They kept defending the isolated stronghold with a small number of soldiers.
要塞 is the standard modern word for a fortress, whereas 塁 is a more literary term often referring specifically to an earthen rampart or defensive works.
塁 (base; fortress) and 累 (accumulation; involvement) share the same reading るい but have completely unrelated meanings.
bases loaded
stolen base; base stealing; steal
getting on base; reaching base · times on base; TOB
first base · first baseman · one fort
third base
second base
base hit
base; stronghold; main fort · home base; home plate
second baseman
Standard kanji spelling; used in both baseball and fortress senses.
The kanji 塁 originally depicted piled earth and is associated with ramparts and fortifications. The baseball sense is a semantic extension from the idea of a 'base' as a defended position.
base umpire
third baseman
runner left on base; leaving runners on base · remnant fort; remaining fortification
earthen wall; earthwork; embankment
horst
fortress; stronghold
stronghold; fortified position
fort; fortress; stronghold
on base · on a fort; on a rampart
rampart; fortification wall
softball
isolated stronghold; isolated fort
returning to base; tagging up