築く

Etymology 1
From, attested in the completed in 733.

, for a base sense of “to make something using a pounder or mallet”, much as when building up rammed earth or stonework.

This term as +  then underwent conflation with, or was reanalysed as,  +  with a basic sense of “to construct”. This latter derivation is given as the only etymology in some references. However, the “to construct” sense is attested centuries later in 1081. Moreover, the “castle, fortress” sense for the initial ki- element was pronounced in 🇨🇬 as, while the “pounder, mallet” sense was pronounced.

Verb

 * 1)  to build up
 * 2)  to construct (a castle, fort, etc.)

Etymology 2
From. Cognate with 🇨🇬.

Verb

 * 1)  to build up, to pile up, to amass