一路|いちろichiro[2]nakadaka (mid-high)

1. adverbstraight; directly
2. nounvoyage; journey; straight road

• SynonymまっすぐNeutralEveryday word for straight or direct, also honest in character. 「一路」 is more written in tone, mostly as 「一路〜へ」, heading straight for somewhere.
• Synonym真直ぐますぐNeutralThe same word as above; as an adverb it means going without a detour, as in 「まっすぐ帰る」. Far more colloquial than 「一路」 — this is what people say in daily speech.
• Antonym曲折きょくせつWrittenWritten word for winding or for the twists and turns of events; the opposite of 「一路」's straight, direct sense, and often figurative for a hard, checkered path.
• Antonym回り道まわりみちNeutralA detour or roundabout route, also figuratively a roundabout course in life; the opposite of 「一路」 heading straight for one's destination.

In everyday speech say 「まっすぐ」 to mean going straight or directly. In written prose, 「一路」 heads straight for a place, as in 「一路東京へ」. For a detour or roundabout route, use 「回り道」.

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

1. 一いち本ぽんの道みち。
2. まっすぐに。ひたすら。