継つぎ足たす

godan verb (-su), transitive verb

extend; add to; supplement

Used for physically extending something by joining or adding material, or for replenishing a supply (e.g., adding liquid to a pot, coals to a fire). Often implies continuing or supplementing what is already there.

• 家いえを継つぎ足たして部屋へやを増ふやした。

  We extended the house and added a room.

• 煮に物ものの汁しるが少すくなくなったので、だしを継つぎ足たした。

  The simmered dish was running low on liquid, so I added more broth.