This is the 463rd most frequent Turkish word.
ihtiyacı
"İhtiyacı" means "his/her/its need" or "the need of him/her/it" in English.
Here, 'ihtiyacımız' (our need) represents a collective need ('our') for the action of repairing the house. The word 'ihtiyaç' bears the possessive suffix '-ımız' to show that this is 'our' necessity.
Evin tamir edilmesine acil ihtiyacımız var.
We urgently need the house to be repaired.
In this sentence, 'ihtiyacı' refers to 'their need', with the use of '-ı' showing ownership. The adverb 'çok' qualifies the extent of this necessity.
Onların bu konuyu anlamaya çok ihtiyacı vardı.
They really needed to understand this topic.
In this sentence, 'ihtiyacı' indicates the necessity ('need') of a new computer for the child. The possessive suffix '-ı' (indicating 'his/her/its') attaches to 'ihtiyaç', making it 'ihtiyacı' (his/her/its need). The subject 'bu çocuğun' is in the genitive case, showing possession of this necessity.