IPA: /səˈpoʊzɪŋ/
KK: /səˈpoʊzɪŋ/
Used to introduce a hypothetical situation or assumption.
Supposing it rains tomorrow, we will have to cancel the picnic.
Supposing is formed from "supponere" (meaning to place under) and the suffix "-ing" (indicating the action or process). The word refers to the action of placing a condition or assumption under consideration.
Think of 'placing under' a condition or assumption when you hear 'supposing' — it helps you remember that it involves considering something as a possibility.