► 副詞
突然 [とつぜん] meaning: sudden rank: 1
☆ 突然爆発音がした ⇨ Suddenly I heard an explosion
☆ 突然雨が降り出した ⇨ Suddenly it started raining
突然 [とつぜん] meaning: unexpected rank: 1
☆ それは全く突然の出来事だった ⇨ That was a completely unexpected, out-of-the blue, incident (☛ Sudden and unexpected)
More examples:
- 突然ドカンと音がした ⇨ Suddenly there was a boom
 - 最初は全く分からなかったが、ある日突然分かり出した ⇨ I didn’t understand it at all at first, but one day I suddenly started understanding
 - 彼女は突然素っ頓狂な声を上げた ⇨ She suddenly made a strange scream
 - 私の車の前に突然子供が飛び出した ⇨ A kid suddenly ran out in front of my car
 - ブーツを脱ごうと頑張っていたら突然すぽっと抜けてひっくり返ってしまった ⇨ When I was trying to take my boot off my foot suddenly came off with a pop and I fell backward
 - 突然ドンと音がした ⇨ Suddenly there was a bang, boom, thud
 - 彼はしばらく呆然としていたが、突然我に返った ⇨ He was dazed for a while but suddenly snapped back to himself
 - 突然警報が鳴って彼は布団から飛び起きた ⇨ Suddenly an alarm went off and he jumped out of his bed
 - 突然雨が猛烈に降り始めた ⇨ Suddenly it started to rain extremely hard
 - 彼女が突然バタンと倒れた ⇨ She suddenly fell flat with a thud
 - 私が社長と話していると突然あいつがしゃしゃり出て来た ⇨ I was talking with the CEO and suddenly he appeared and tried to insert himself
 - 突然地面が突き上げるように揺れた ⇨ Suddenly the ground shook with thrusts from beneath
 - 人間が突然変異して火を吹くことは有り得ない ⇨ Humans will never mutate and breathe fire
 - 突然空がピカッと光った ⇨ Suddenly there was a flash in the sky
 - 突然火山が噴火して人々に岩が降り掛かった ⇨ Suddenly the volcano erupted and rocks rained down on people