He was eloquent, effective, forceful, and occasionally overbearing. Douglass understood that the struggle for emancipation and equality demanded forceful, persistent, and unyielding agitation. Titchener was a charismatic and forceful speaker. The concepts Rubens artistically represents illustrate the male as powerful, capable, forceful and compelling. They swim faster and their tail movements become more forceful and erratic. His writings conveyed his direct, forceful and unhesitating approach. Stressed syllables are often perceived as being more forceful than non-stressed syllables. To his contemporaries, he appeared as forceful and reckless, and also, very attractive to women. There are two types of breathing, "forceful" and "gentle". Boxing techniques utilize very forceful strikes with the hand. The traditionalists therefore argue that there is no benefit to sparring with more forceful strikes. Israel argued that violence from Palestinians necessitated a forceful response. They assist as muscles of exhalation in the breathing process during forceful exhalation. They may be pronounced by initiating or with an especially forceful airflow. She was the most determined, the most forceful, the most difficult.