We were overcome by fatigue after the long journey.
You should gradually increase the duration of your workout.
Heredity plays no part in the disease.
There are no obvious distinctions between the two designs.
1.fatigue [fəˋtig]
weariness or exhaustion from labor, exertion, or stress
ex:The drug's side effects include headache and fatigue.
2.duration [djʊˋreʃən]
continuance in time
ex:The duration of the examination is three hours.
3.heredity [həˋrɛdətɪ]
the sum of the characteristics and potentialities genetically derived from one's ancestors
ex:My height comes from my heredity.
4.maturation [͵mætʃʊˋreʃən]
the process of becoming mature
5.distinction [dɪˋstɪŋkʃən]
the quality or state of being distinguishable
ex:He was raised in a small town of no great distinction.