Focussing

I continued focussing on it, wondering if there was a way to get in and learn its secrets.

Anthroponyms in languages like Polish, Basque, Latin and Armenian can take many forms depending on their function in a sentence, so focussing nearly exclusively on only one or two names on Tatoeba doesn't end up helping us much when it comes to reflecting the variety that the aforementioned languages require in this aspect.

The bacteriologist adjusted the focussing knob on the microscope.

At the time of the accident, the searchlight signals here were fitted with standard narrow-beam focussing, aimed at a train within 70yd of the signal.