'Hard' in the Bible

I work hard and struggle to do this, using the energy that he powerfully provides in me.

Fathers, do not provoke or irritate or exasperate your children [with demands that are trivial or unreasonable or humiliating or abusive; nor by favoritism or indifference; treat them tenderly with lovingkindness], so they will not lose heart and become discouraged or unmotivated [with their spirits broken].

For I testify about him that he works hard for you, for those in Laodicea, and for those in Hierapolis.