雪がしきりに降っていた。

snow

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

frequently; repeatedly; often; incessantly; constantly; strongly; eagerly

to descend; to go down; to come down; to be handed down (of an order, judgment, etc.); to pass (of time); to surrender; to capitulate; (often in neg. form) to be less than; to be inferior to; to have the runs; to have diarrhea