Brown Driver Briggs

 1. to strengthen, prevail, harden, be strong, become strong, be
courageous, be firm, grow firm, be resolute, be sore
  1) (Qal)
1a1. to be strong, grow strong
1a  1) to prevail, prevail upon
1a  2) to be firm, be caught fast, be secure
1a  3) to press, be urgent
1a  4) to grow stout, grow rigid, grow hard (bad sense)
1a  5) to be severe, be grievous
1a2. to strengthen
  2) (Piel)
1b1. to make strong
1b2. to restore to strength, give strength
1b3. to strengthen, sustain, encourage
1b4. to make strong, make bold, encourage
1b5. to make firm
1b6. to make rigid, make hard
  3) (Hiphil)
1c1. to make strong, strengthen
1c2. to make firm
1c3. to display strength
1c4. to make severe
1c5. to support
1c6. to repair
1c7. to prevail, prevail upon
1c8. to have or take or keep hold of, retain, hold up, sustain, support
1c9. to hold, contain
  4) (Hithpael)
1d1. to strengthen oneself
1d2. to put forth strength, use one's strength
1d3. to withstand
1d4. to hold strongly with