A strong identity: has the power to move or perform demanding tasks. Brawny. Strapping. Meaty. Robust. Tough. Rugged. Lusty. Exerting great force, such as a strong current. Fierce. In an argument or case, likely to succeed. Compelling, cogent, forceful, powerful, potent, able to withstand great force or pressure. Well built, indestructible, well fortified, impregnable, established. Passionate, fervent, intense. Assertive, tough, tenacious, indomitable, formidable, undiluted.