Strain
                    
                    (STRESS p350) w/ RH "S" (knuckle presses on LH index)
                
                            Affixes
- eye+ — Eyestrain
 - over+ — Overstrain
 - pre+ — Prestrain
 - re+ — Restrain
 - +ed — Strained
 - +er — Strainer
 - +ing — Straining
 - +ing, +ly — Strainingly
 - +s — Strains