粘着|ねんちゃくnenchaku[0]heiban (flat)

1. noun, suru verb, intransitive verbcohesion; adhesion

• Synonym付着ふちゃくNeutralSticking to or landing on a surface; neutral. 「粘着」 stresses sticking through its own stickiness, and can also mean pestering someone online.
• Synonym密着みっちゃくNeutralFitting tightly against something; also close-up coverage, as in 「密着取材」. It stresses close contact, not stickiness.
• Synonym接着せっちゃくNeutralJoining two objects so they cannot easily come apart; gluing, as in 「接着剤」. 「粘着」 stresses sticking through stickiness.
• Synonym膠着こうちゃくWrittenWritten/formal prose: sticking fast, but mostly a stalemate, as in 「膠着状態」. 「粘着」 stresses sticking through stickiness.
• Synonym固着こちゃくWrittenFirmly attached; also fixation or obsession, in written prose, as in 「固着観念」. 「粘着」 stresses sticking through stickiness.
• Related癒着ゆちゃくNeutralTissues or organs fusing together; by extension, collusion between officials and business — negative, as in 「政官財の癒着」. 「粘着」 is just ordinary sticking.
• Related引っ付くひっつくCasualColloquial verb: sticking together, or a man and woman getting close; has a casual feel. 「粘着」 is a written-style noun.
• RelatedくっつくCasualColloquial verb: things sticking together, or a couple being inseparable. The everyday go-to; 「粘着」 leans written.
• Related吸着きゅうちゃくWrittenAdsorption, a chemistry term as in 「吸着剤」: gas or liquid clinging to a surface. 「粘着」 sticks through stickiness.
• Related張り付くはりつくNeutralVerb: a thin thing sticking flat and staying put; also staking out a spot, as in 「記者が張り付く」. Stickiness is not the point.
• Related吸い付くすいつくNeutralVerb: sucking onto something or clinging as if by suction, as in 「吸盤が吸い付く」「肌に吸い付く」. Stresses tight contact, not necessarily stickiness.
• Related粘つくねばつくNeutralVerb: being sticky or stringy — the sticky feel itself, as in 「手が粘つく」. 「粘着」 is about things sticking.
• Related粘りつくねばりつくNeutralVerb: sticking on and staying put through stickiness, as in 「泥が粘りつく」. Essentially the verb form of 「粘着」.
• RelatedこびりつくNeutralVerb: grime stuck on so hard it won't come off; also a memory or impression that lingers. 「粘着」 has no such hard-to-remove feel.
• RelatedへばりつくCasualColloquial verb: pressing flat against something, as in 「地面にへばり付く」. No stickiness implied.
• Related凝着ぎょうちゃくWrittenWritten/formal prose and technical: different substances sticking to each other on contact. 「粘着」 stresses sticking through stickiness.
• RelatedしがみつくNeutralVerb: gripping tight and refusing to let go, as in 「母親にしがみ付く」. Nothing to do with stickiness.
• Related絡みつくからみつくNeutralVerb: twining or coiling around; also pestering someone, as in 「酔っ払いに絡みつかれる」. Nothing to do with stickiness.
• RelatedべとつくNeutralVerb: sticky in an unpleasant way, as in 「汗でべとつく」. 「粘着」 carries no like-or-dislike.
• Related糊着こちゃくWrittenPasting with glue; also stubborn fixation. Written prose and rare. 「粘着」 is the general term for sticking through stickiness.
• Antonym離脱りだつNeutralWithdrawing from a state or group, as in 「戦線離脱」. Opposes 「粘着」 only as leaving vs. sticking; for objects peeling off, use 「剥離」.
• Antonym剥離はくりNeutralPeeling off or detaching — the opposite of 「粘着」, as in 「剥離紙」: a stuck surface coming away.

「粘着」 is for sticking because of stickiness, as in 「粘着テープ」. For something merely getting on a surface, say 「付着」; for bonding objects together, 「接着」; for tight contact, 「密着」; for grime stuck on hard to remove, 「こびりつく」. In casual speech the verb 「くっ付く」 is the everyday go-to. The opposite of sticking is 「剥離」.

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

1. 粘り付ねばりつくこと。