Ever felt someone is trying to dupe you? Laocoon knew but it would not save him or his countrymen.

quidquid id est, timeo Danaos et dona ferentis.

Whatever it is, I fear the Greeks even when bringing gifts.

Quidquid (whatever) a pronoun

Id (that or it)

Est (it is)

Timeo (I fear or I dread) is in the first person singular present indicative form.

Danaos (Greeks or Danaans) is the accusative plural form of "Danaus," used here to refer to the Greek soldiers in the Trojan War.

Et (and)

Dona (gifts) is the accusative plural form of "donum."

Ferentis (bringing) is the present active participle of "ferre," modifying "dona."