sink into

phrasal verb
1
to go gradually into a less active, happy or pleasant state
فرو رفتن در, غرق شدن در, در خود فرو رفتن
2
to go down into another substance through the surface
فرو رفتن در, نفوذ کردن به
The rain sank into the dry ground.
3
to go, or to make something sharp go, deep into something solid
فرو رفتن در, فرورفتن, فرو کردن
I felt her nails sink into my wrist.
The dog sank its teeth into my leg .
4
to spend a lot of money on a business or an activity, for example in order to make money from it in the future
سرمایه‌گذاری کردن در, خرج کردن برای, سرمایه‌گذاری کردن
We sank all our savings into the venture.