1. bereavement /bəˈriːvmənt/= when someone loses a close friend or relative because they have died
e.g. depression caused by bereavement or divorce
2. tenet /ˈtenɪt/ = a principle or belief, especially one that is part of a larger system of beliefs
central/basic/fundamental etc tenet
one of the basic tenets of democracy
tenet of
e.g. the main tenet of his philosophy
3. intensify = (intensified, intensifying, intensifies)[intransitive, transitive] to increase in degree or strength, or to make something do this
In June the civil war intensified.
His mother’s death intensified his loneliness.
—intensification /ɪnˌtensɪfɪˈkeɪʃən/ noun [singular, uncountable]
an intensification of fighting in the region