The antonyms for the phrase "gave an account of" would include "withheld information," "kept silent," "concealed details," "ignored," "left out," and "avoided discussion." When we give an account of something, we are essentially providing a detailed report or explanation of a particular event or situation. However, there may be times when we deliberately choose not to disclose certain information, either because it is confidential or because it might be detrimental to our interests. In such cases, we may choose to withhold information, avoid discussing the matter altogether, or simply ignore questions about it.