an ax used by mountain climbers for cutting footholds in ice

a meson involved in holding the nucleus together; produced as the result of high-energy particle collision

someone who helps to open up a new line of research or technology or art

one the first colonists or settlers in a new territory

open up an area or prepare a way

take the lead or initiative in; participate in the development of

open up and explore a new area

having or showing or expressing reverence for a deity

insincere talk about religion or morals

in a devout and pious manner

righteousness by virtue of being pious