Strong's #5999: `amal (pronounced aw-mawl')
 from 5998; toil, i.e. wearing effort; hence, worry, wheth. of body or mind:--grievance(-vousness), iniquity, labour, mischief, miserable(-sery), pain(-ful), perverseness, sorrow, toil, travail, trouble, wearisome, wickedness.
Brown-Driver-Briggs Hebrew Lexicon:
 
  ‛âmâl 
 
 1) toil, trouble, labour
 
 1a) trouble
 1b) trouble, mischief
 1c) toil, labour
 
  Part of Speech: noun masculine or feminine
Relation: from H5998
Usage:
This word is used 55 times:
Isaiah 53:11: "He shall see  of the travail of his soul, and shall be satisfied: by his knowledge shall my righteous servant"
Isaiah 59:4: "and speak lies; they conceive  mischief, and bring forth iniquity."
Jeremiah 20:18: "came I forth out of the womb to see  labor and sorrow, that my days should be consumed"
Habakkuk 1:3: "dost thou show me iniquity, and cause me to behold  grievance? for spoiling and violence are before me: and there are"
Habakkuk 1:13: "and canst not look on  iniquity: wherefore lookest thou upon them that deal treacherously,"