裂け目・裂目|さけめsakeme[3]odaka (tail-high)

1. nountear; rip; rent; slit; crack; chasm; rift
   私は壁かべの裂け目さけめから外そとを覗のぞいた。↗

   I peeped out through a crack in the wall.

• Synonym亀裂きれつWrittenWritten/formal word for cracks, mostly in walls or the ground; also figuratively for a rift in a relationship.
• SynonymひびNeutralFine cracks, typically in pottery or walls; also a metaphor for an emotional rift. Usually written 「ひび」; common in daily use.
• Synonym割れ目われめNeutralCommon in everyday speech; stresses hard objects cracking apart, while 「裂け目」 stresses tearing.
• Synonym破れ目やぶれめNeutralA tear or split in cloth or paper; stresses being torn. Close to 「裂け目」 but rarely used.
• Synonym裂罅れっかFormalFormal and rare; means a crack or fissure, synonymous with 「割れ目」.
• SynonymやぶれNeutralColloquial; focuses on the damaged state — a hole or torn spot — rather than a linear split.
• Related隙間すきまNeutralThe most common everyday word for a gap: any space between two things or left by a crack. 「裂け目」 is specifically a linear tear.
• Related隙すきNeutralA gap or opening, colloquial; it leans toward an unguarded moment or opening to exploit, so it is more abstract than 「隙間」.
• RelatedクラックNeutralLoanword for a crack; also means illegally breaking into a computer system. Mostly in technical fields.
• Related割り目わりめNeutralA crack or split; rare, and synonymous with 「割れ目」.
• Relatedひび割れひびわれNeutralFine surface cracks; common in everyday speech, especially for walls and pottery. Finer than 「裂け目」.

Use 「裂け目」 for a linear opening made by tearing or splitting. For hard objects cracking, pick 「割れ目」; for fine surface cracks, 「ひび」 or 「ひび割れ」; in written or formal prose, 「亀裂」. 「隙間」 is the everyday word for gaps in general.

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

1. 線せん状じょうに裂さけた部分ぶぶん。
2. 馬うまの口くちの裂さけた所ところ。