concentrating
v. B1 Intermediate US //ˈkɑnsənˌtɹeɪtɪŋ// UK //kˈɒnsəntɹˌeɪtɪŋ// con·cen·trat·ing
v. to focus all your attention on one thing. You use this when you need to think hard or listen carefully.
v. to direct one's full mental attention toward a specific task, object, or idea.
I am concentrating on my homework now.
She sat in the quiet library to concentrate on her final exam revision.
The surgeon had to concentrate intensely for hours, filtering out all external distractions to ensure precision.
Usage
The verb is intransitive and typically takes the preposition 'on' to introduce the object of focus.
Pitfall
I am concentrating in my workI am concentrating on my workThe verb 'concentrate' pairs with the preposition 'on', not 'in'.