ดู

From Proto-Southwestern Tai *ˀduːᴬ³ (“to look; to watch”). Compare Lao ດູ (dū), Northern Thai ᨯᩪ, Tai Dam ꪒꪴ, Shan လူ (lǔu), Phake ꩫူ (nū), Ahom 𑜎𑜥 (lū).

For the derived sense of "for trial", note a similar semantic association found in the unrelated Japanese 見る (miru, “to see; (auxiliary) to try”).

ดู • (duu) (abstract noun การดู)

1. to view; to look; to watch.
2. to view; to consider; to examine; to inspect.
3. to view; to consider; to regard; to deem.
4. to look; to seem; to appear.
5. to look (after); to take care (of); to guard; to protect.
6. to see; to foresee; to foretell.
7. to see; to find out; to learn; to ascertain.

   รอดู

   rɔɔ duu

   to wait [and] see

ดู • (duu)

1. for trial; experimentally.

   กินดู

   gin duu

   to try eating [something]
   (literally) to eat [something] for trial

   ลองดู

   lɔɔng duu

   to try; to try out
   (literally) to try for trial

• “ดู” in Thai Dictionary Project (TDP) (UC Berkeley 1964) (plus additional data from the Royal Institute of Thailand (RI) and NECTEC's LEXITRON project (LEX)). Searchable online at SEAlang.net.