verb

• (transitive) To avoid, especially a duty, responsibility, etc.; to stay away from.
  "the usual makeshift by which they try to shirk difficulties"
• (intransitive) To evade an obligation; to avoid the performance of duty, as by running away.
  "If you have a job, don't shirk from it by staying off work."
• (transitive) To procure by petty fraud and trickery; to obtain by mean solicitation.
  "You that never heard the call of any vocation, […] that shirk living from others, but time from yourselves."

noun

• (Islam) The unforgivable sin of association (claiming something or someone can share in the oneness of God).
  "A person can have committed shirk in their lifetime and still find forgiveness (especially by saying the Shahada and becoming a Muslim). The concept is that if one dies in this state (as a mushrik, an idolator, one who engages in and does not repent shirk), there is no forgiveness."