supposing

verb

1. (form-of, gerund, participle, present)present participle and gerund of suppose

noun

1. The act of making a supposition.

   “She could have joined most comfortably in all their supposings, and suspicions, and doubts, and prognostications, but the honour of the family was too nearly concerned to allow free reins to her tongue.”

conj

1. if hypothetically (optionally followed by that)

   “Let’s go swimming in the lake. - Supposing there are/were 'gators.”

   “Supposing our daughter was to marry her sweetheart, and supposing they was to have a son, and supposing he was to grow to man’s estate, and supposing he was to come down to draw cider like as we’re doing, and supposing that there mallet was to fall on his head and kill him, how dreadful it would be!”