The corrcet answer would be relational.
A loaded word is a word that not only informs but also caries some emotion with it, such as condemning, exciting, praising.
In the statement above the loaded word is "crushing" - it makes a qualitative statement about the defeat: it was a very definite defeat.
Summary of Act 5 scene 1
At night, in the king’s palace at Dunsinane, a doctor and a gentlewoman discuss Lady Macbeth’s strange habit of sleepwalking. Suddenly, Lady Macbeth enters in a trance with a candle in her hand. Bemoaning the murders of Lady Macduff and Banquo, she seems to see blood on her hands and claims that nothing will ever wash it off. She leaves, and the doctor and gentlewoman marvel at her descent into madness.
What happened In Act 5 scene 1
Suddenly, Lady Macbeth enters in a trance with a candle in her hand. Bemoaning the murders of Lady Macduff and Banquo, she seems to see blood on her hands and claims that nothing will ever wash it off. She leaves, and the doctor and gentlewoman marvel at her descent into madness.
