showing a fighting disposition; "highly competitive sales representative"; "militant in fighting for better wages for workers"; "his self-assertive and ubiquitous energy"
United States tennis player who in 1938 was the first to win the Australian and French and English and United States singles championship in the same year (1915-2000)
refuse to acknowledge; disclaim knowledge of; responsibility for, or association with; "Her husband disavowed her after 30 years of marriage and six children"