в большой

in a big...

→ в
phrase Uncommon #13,910
in a big... This is a form of в + большой, with the adjective changing to agree with the following feminine noun. Depending on context, it can also mean “into a big...” or express a greater degree, as in в большей безопасности (“safer”).
RU: Она живёт в большой квартире.
EN: She lives in a big apartment.

Девочка была в большой красной шляпе.

The girl was wearing a big red hat.

Том в большой опасности.

Tom is in great danger.