IPA: /sɪˈlɛk.tɪ.vɪ.ti/
KK: /sɪˈlɛk.tɪ.vɪ.ti/
The quality or ability to choose carefully or to be particular about what is selected.
The selectivity of the new filter allows it to only capture specific frequencies.
Selectivity → It is formed from "select" (from Latin "selectus", meaning chosen) and "-ivity" (a suffix indicating a state or condition). The word "selectivity" refers to the state of being selective or the quality of choosing carefully.
Think of the word 'select' meaning to 'choose' and remember that 'selectivity' describes the quality of being careful in choosing.