揺るぐ|ゆるぐyurugu[2]nakadaka (mid-high)

1. godan verb, intransitive verbto shake; to waver; to tremble
   彼かれの信念しんねんは何事なにごとにも揺ゆるがなかった。↗

   Nothing could sway his conviction.

• Synonym揺れるゆれるNeutralThe most general verb for things shaking or swaying; 「揺るぐ」 is more written and mostly figurative about foundations wavering.
• Related揺らぐゆらぐNeutralCovers physical shaking and, figuratively, wavering confidence or status; more common in everyday use than 「揺るぐ」, which often appears in the negative 「揺るがない」.
• RelatedガタガタCasualOnomatopoeic for rattling, clattering shaking, and figuratively for an organization falling apart; colloquial.
• Related動揺どうようNeutralAgitation of the mind — being upset or shaken emotionally, as in 「動揺を隠せない」; common in daily speech too.
• Related震動しんどうWrittenWritten noun for vibration or shock — earthquakes, machinery — or a jolt to society and people's hearts; unlike 「揺るぐ」 it does not describe foundations wavering.
• RelatedゆらゆらNeutralMimetic word for slow, gentle swaying — flames, water plants; carries no sense of wavering resolve.
• RelatedよろめくNeutralTo stagger or lose one's footing; figuratively to be swayed by temptation or fall for someone.
• Related震えるふるえるNeutralTo tremble or shiver, as in 「寒さで震える」; focuses on the body.
• Relatedぐら付くぐらつくCasualColloquial: to sway unsteadily, be unable to stand firm; figuratively a resolve wavering.
• RelatedガクガクCasualColloquial mimetic word: legs buckling or trembling, parts coming loose.
• Related震盪しんとうWrittenWritten word for violent shaking or concussion, mostly seen in 「脳震盪」.
• RelatedたゆたうWrittenLiterary, poetic word for drifting to and fro or hesitating irresolutely.
• Related震うふるうWrittenRead 「ふるう」; an old-fashioned verb for trembling — in modern usage 「震える」 is the normal choice.
• Related揺らめくゆらめくNeutralTo flicker or sway, as in 「炎が揺らめく」; carries a graceful, aesthetic nuance.
• RelatedがたつくCasualColloquial: to rattle and be shaky; figuratively a situation becoming unstable.
• RelatedふらつくNeutralTo totter on unsteady, dizzy feet; also to wander about aimlessly or be unable to make up one's mind.
• Antonym固まるかたまるNeutralTo harden, solidify, or become settled and firm — opposite of wavering.
• Antonym不動ふどうWrittenWritten word for being immovable and unshakable, as in 「不動の地位」; the antonym of 「揺るぐ」.
• Antonym安定するNeutralTo become stable or settle down — the direct opposite of the wavering 「揺るぐ」 describes.

For things physically shaking, use 「揺れる」. For confidence or status wavering in written prose, use 「揺るぐ」, often in the negative as 「揺るぎない自信」. For wavering in general, 「揺らぐ」 is the everyday choice. For firmness, say 「不動」. Mimetic words like 「ガタガタ」「ガクガク」 are colloquial; 「震動」「震盪」 are written nouns; 「震える」 covers bodily trembling.

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

1. 左右さゆうに動うごく。震ふるえる。
2. 心こころや考かんがえが不安定ふあんていになる。変かわりやすくなる。