to leave in poorer quality by adding something inferior

• Pliable
• Adulterate
• Unkempt

equally skillful with both hands 

• Pliable
• Augment
• Ambidextrous

to make something greater by adding to it

• Augment
• Stolid
• Tentative

sorrowful through loss or deprivation

• Unkempt
• Deploy
• Bereft  

Deploy 

• courage in pain or adversity
• to move troops in to position for military action
• relentlessly severe;appearing gloomy or sour

relentlessly severe;appearing gloomy or sour

• Dour
• Verbatim
• Warily

courage in pain or adversity 

• Intimation
• Guise
• Fortitude

to be or become wide open 

• funnel 
• Gape 
• detect 

an insulting or mocking remark; a taunt

• Gibe
• outlandish 
• live 

general external appearance; semblance

• Guise
• Reiterate
• Bereft