乗り出す|のりだすnoridasu[3]nakadaka (mid-high)

1. godan verb, transitive verbto set out; to set sail
   人類じんるいは宇宙うちゅうに乗り出のりだすことに成功せいこうした。↗

   Human beings succeeded in flying into space.
2. godan verb, transitive verbto embark on (a new venture); to set out (to achieve something)
   彼かれは新あたらしい事業じぎょうに乗り出のりだした。↗

   He embarked on a new enterprise.
3. godan verb, transitive verbto begin to ride
4. godan verb, transitive verbto lean forward

• SynonymスタートNeutralLoanword for a start or the start of a race; common in everyday speech.
• Synonym取り掛かるとりかかるNeutralThe usual verb for getting started on work; it stresses setting about the task at hand.
• Synonym着手ちゃくしゅNeutralWritten-style word for setting to work, as in 「工事に着手」; it centers on the start of actual work.
• Synonym踏み出すふみだすNeutralTo take the first step, figuratively beginning a new venture; it carries a sense of courage.
• Related始めるはじめるNeutralThe most widely used word for starting or founding something; neutral, and without the sense of personally setting out that 「乗り出す」 carries.
• Related開始かいしNeutralFormal, written-style word for a start, as in 「試合開始」; it centers on the starting point in time.
• Related発足ほっそくNeutralFor the formal launch of an organization, system, or movement; 「乗り出す」 instead stresses personally setting out and getting involved.
• Related始動しどうNeutralFor starting up a machine or engine, or a project going into operation; the emphasis is on getting something running.
• RelatedしだすNeutralColloquial verb for beginning to do something; also to make food and deliver it. It lacks the force of boldly taking on a big undertaking that 「乗り出す」 has.
• Related乗りかかるのりかかるNeutralFor being about to board a train or bus, or just starting something, as in 「乗りかかった船」; stresses that once you have begun it is hard to back out.
• Relatedし始めるしはじめるNeutralColloquial verb for starting to do something; it highlights the moment of beginning and, unlike 「乗り出す」, does not stress active involvement.
• Related乗り掛けるのりかけるNeutralFor being just about to board or get on, or starting a task; close in meaning to 「乗りかかる」.
• RelatedおっぱじめるCasualCoarse, colloquial verb for hurriedly starting something, as in 「喧嘩をおっ始める」.
• RelatedやりだすCasualColloquial verb for starting to do something, with a casual, offhand feel.
• Relatedやり始めるやりはじめるNeutralColloquial verb for starting to do something; synonymous with 「し始める」.
• Antonym降りるおりるNeutralAntonym: to get off a vehicle, or to withdraw or give up; the opposite of boarding and setting out to take something on.

Use 「乗り出す」 for setting out by boat or boldly taking on a major undertaking, as in 「捜査に乗り出す」 or 「新事業に乗り出す」; it can also mean leaning forward, as in 「身を乗り出す」. For starting something in general, use 「始める」; for getting down to a task, 「取り掛かる」. The antonym is 「降りる」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 乗り物のりものに乗のり始はじめる。
2. 乗り物のりものに乗のって出立しゅったつする。
3. 物事ものごとに進すすんで関かかわる。進出しんしゅつする。
4. 身みを前まえに出だす。