EntryCommonJLPT N4
  1. Auxiliary, Na-adjective (keiyodoshi)

    appearing that; seeming that; looking like; having the appearance of

    after -masu stem or adj. stem

    まもなく雨が降りそうだ。
    It is going to rain soon.

Also written そっそーそ〜そおそーおそーうそおおそぅ

Pitch on OJAD