What's the difference between thereunder and whereat?

Thereunder


Definition:

  • (adv.) Under that or this.

Example Sentences:

  • (1) Case 1: mild weakness in right upper and lower limbs and left small hand muscles, mild superficial and deep sensory disturbance on bilateral palms and soles and decrease of vibration on bilateral lumbar regions and thereunder.

Whereat


Definition:

  • (adv.) At which; upon which; whereupon; -- used relatively.
  • (adv.) At what; -- used interrogatively; as, whereat are you offended?

Example Sentences:

  • (1) ), whereat measurements can be taken either using cylindrical graphitic walls or "no walls".