falling
Word family
Synonym discussion
Sense: adjective/1
All three describe a downward movement, but they differ in register and connotation. 'Decreasing' is the most neutral and formal of the group — it simply states that the amount is going down ('decreasing temperatures'). 'Declining' suggests a more gradual or worrying downward trend, often with an implied judgment about quality or health ('declining test scores'). 'Dropping' feels the most informal and immediate, as if the speaker is observing a change right now ('dropping prices in the supermarket'). In everyday speech, 'falling' overlaps most with 'dropping' for concrete measures like temperature and price, but 'falling' also works for abstract things like energy levels or morale. Use 'declining' when you want to add a tone of concern or long-term trend. Use 'decreasing' in more formal or written contexts.
Etymology
'Falling' is the present participle of the verb 'fall', which traces back to Old English 'feallan' (to drop from a height, to decay). This Germanic root (Proto-Germanic *fallaną) is shared with Dutch 'vallen' and German 'fallen'. The sense of 'becoming lower in amount or strength' developed through physical metaphors: something that falls physically drops, so by extension, numbers, prices, temperatures, and even morale can 'fall' — and 'falling' as an adjective describes being in the process of that downward change.