1.hidden2.crypto-3.recessive (gene)
1.(of a system or product etc) adapted to human needs2.people-oriented3.user-friendly
1.character acquired through long habit2.habits and properties
1.international2.internationalism
1.technical2.technological
professionalism; specialization
1.(lit. and fig.) corrosive2.corrosiveness
1.hereditary2.inherited3.genetic
1.nature2.characteristic3.moral character
1.innovative; ingenious2.originality; ingenuity
1.adaptability2.flexibility
1.qualities that make sth popular or fashionable2.(of a disease) epidemic
1.periodic2.periodicity (math)3.cyclicity
1.to personalize2.to customize3.customization