The verbal noun (and participial adjective) ageing (from the verb 'to age') can be seen in two different spellings: ageing in the British variety and aging in the American. The British spelling is to be preferred - not merely out of loyalty or familiarity, but because the '-e-' after the '-g-' serves to show the pronunciation - that the '-g-' is 'soft', like a '-j-'.
- Compare changeable.
Don't confuse ageing (or 'aging') with
- the representation of an informal pronunciation of 'against'.
aginis a colloquial pronunciation, it should not be used in academic writing.)