| piolet | (noun) an ax used by mountain climbers for cutting footholds in ice | Synonyms: ice ax, ice axe |
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| pion | (noun) a meson involved in holding the nucleus together; produced as the result of high-energy particle collision | Synonyms: pi-meson |
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| pioneer | (noun) one of the first colonists or settlers in a new territory | - |
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| (noun) someone who helps to open up a new line of research or technology or art | Synonyms: groundbreaker, innovator, trailblazer |
| (verb) open up and explore a new area | - |
| (verb) open up an area or prepare a way | Synonyms: open up |
| (verb) take the lead or initiative in; participate in the development of | Synonyms: initiate |
| pious | (adjective) having or showing or expressing reverence for a deity | - |
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| piously | (adverb) in a devout and pious manner | Synonyms: devoutly |
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| piousness | (noun) righteousness by virtue of being pious | Synonyms: piety |
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