the invisible gaseous mass surrounding the earth, consisting mainly of oxygen and nitrogen

a space or a gap

ख़ाली जगह

English Usage: There was air between them as they walked apart.

Hindi Usage: जब वे अलग-अलग चल रहे थे, तो उनके बीच ख़ाली जगह थी।

to make a hole in something using a drill

to teach students by means of repeated exercises

बार-बार अभ्यास द्वारा पढ़ाना

English Usage: The teacher will drill the students on multiplication tables.

Hindi Usage: शिक्षिका छात्रों को गुणन तालिकाओं पर अभ्यास कराएगी।