煮炊き is read as にたき (nitaki) and means cooking.
にたき
nitaki
にる
to boil
にこむ
to cook (various ingredients) together
につめる
to boil down
にもの
nimono
にたつ
にこみ
stew
にえきらない
half-cooked
につまる
to approach a conclusion (of a discussion, investigation, etc.)
にじる
broth
にぼし
(small crunchy) dried sardines
にだす
to extract essence by boiling
にあい
stew made from multiple ingredients