四つ（よっつ）— four (general counter)
箱 が 四つ あります。
There are four boxes.
四つよっつ
four (general counter)
よっつ
accent [3]In detail
Words
箱hakoboxes
がga(marks what is present)
四つyottsufour items
ありますarimasuexists; is present
Kanji
四シ・
四つ is read よっつ. It belongs to the native Japanese counting series; learn the word rather than deriving it from し or よん.
Coco-sensei