đá

• (Hà Nội) IPA^(key): [ʔɗaː˧˦]
• (Huế) IPA^(key): [ʔɗaː˨˩˦]
• (Hồ Chí Minh City) IPA^(key): [ʔɗaː˦˥]

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From Proto-Vietic *l-taːʔ (“rock”); cognate with Arem atæːˀ.

Schuessler (2007) claims that this Vietic word and Khmer ដា (daa) might be related to Chinese 石 (OC *dAk) (B-S) (SV: thạch). However, this is unlikely due to both

• the mismatch between final *-k and *-ʔ (unless Chinese added "the familiar final -k" after foreign *-ʔ, resulting in *-ʔ-k > *-k; for an analogy, Chinese 汝 (OC *naʔ) > Chinese 若 (OC *nak))
• and the fact the Khmer word is likely borrowed from Vietnamese or another Vietic language instead of inheriting from a common source.

(classifier tảng, hòn, viên, cục) đá • (𥒥, 坧)

1. rock, stone
2. (by extension) ice as used for consumption or refrigeration
3. (slang) meth, methamphetamine

• tảng is often used to refer to big rocks, viên to small stones, hòn to mid-sized or small stones/rocks. cục is the colloquial classifier, used for stones and rocks of all sizes, although usually on the smaller side.
• the above "rule" is not always followed.

• băng

From Proto-Vietic *taʔ; cognate with Arem tʌːˀ.

đá • (打, 跢)

1. to kick without using the sole

   Con ngựa đá con ngựa đá.

   The horse kicked the stonen horse.

   các đòn đá taekwondo ― taekwondo kicks

2. (colloquial, slang) to dump (one's girlfriend, boyfriend, etc.); to abandon
3. (Southern Vietnam) to fight each other
4. (Southern Vietnam) to go; to come by
5. (Southern Vietnam) to eat or drink

• đạp
• cước

(classifier cú, đòn) đá • (打, 跢)

1. a kick made without using the sole