upperclassman, sophomore, cognizant. flocking to the Yard in full force to participate

我們在高中或大一時，懂得大一生freshman 、大二生、大三junior、大四senior的英文。
那時候，不知道高中生二年級的英文也叫sophomore，今天才注意到:

Snowfall Does Not Chill Housing Day Spirit

Persistent snowfall and gusts of wind did not prevent upperclassmen from flocking to the Yard in full force to participate in Harvard’s annual Housing Day festivities Thursday morning.

We should all try to be more cognizant of the issue and redouble our efforts to make homelessness a thing of the past.

cognizant

Syllabification: cog·ni·zant

Pronunciation: /ˈkägnəzənt/ (also cognisant)

adjective

[predic.] • formal

• Having knowledge or being aware of: statesmen must be cognizant of the political boundaries within which they work

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  • For the first time since she had left the fort, she looked fully alive to him, cognizant, aware that she existed.
  • People should be cognizant and aware of what's going on around them.
  • ‘We're very cognisant and sensitive of the fact that we're reaching a large audience of varying demographics and we really don't want to shock people in a visceral way,’ he says.
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Origin

early 19th century: probably directly from cognizance.

sophomore

Syllabification: soph·o·more

Pronunciation: /ˈsäf(ə)ˌmôr /

noun

US

• A second-year college or high school student.
  

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Origin

mid 17th century: perhaps from earlier sophumer, from sophum, sophom (obsolete variants of sophism) + -er¹.

upperclassman

Syllabification: up·per·class·man

Pronunciation: /ˌəpərˈklasmən/

noun (plural upperclassmen)

US A junior or senior in high school or college.   More example sentences

• The prom, I'd found out a few weeks ago, was a dance for upperclassmen at her high school.
• It began during my freshman year in college when an upperclassman during orientation told our group we had to learn how to juggle.
• It reminds everyone of the rigid service academy structure, inherited from British boys' schools like Eton, in which upperclassmen dominate their juniors.