1. To feel or express sympathy or compassion
   "sympathise with him, he knew that she herself would not care";
   - commiserate, sympathize
    
2. Share the feelings of; understand the sentiments of
   "She sympathised with the protesters' cause";
   - sympathize
    
3. Be understanding of
   "You don't need to explain—I sympathise!";
   - sympathize, empathize, empathise [Brit], understand

Derived forms: sympathised, sympathising, sympathises

Type of: compassionate [N. Amer, rare], condole with, experience, feel, feel for, pity, sympathize with