Beautiful English words that I think you should use more frequently is:
APPEALING means attractive or interesting.
His rich vocabulary made him sound so appealing.
INEFFABLE means too great or beautiful to describe in words. Something so wonderful that you can't express how wonderful it is.
When I heard of their pregnancy I was filled with ineffable joy.
NEFARIOUS means criminal or extremely bad.
They hacked into my bank account and used the funds for nefarious purposes.
ETHEREAL means extremely light and beautiful seeming to belong to another more spiritual.
At Sunrise, the London Skyline almost looks ethereal.
EPIPHANY means sudden and surprising moment of realization.
When she took the course she had an epiphany and everything became clear.
ANGST means a feeling of great worry or concern about your situation or your life.
I wrote emotional poetry when I was full of teenage angst.
EUPHORIA means an extremely strong feeling of excitement or happiness that usually only lasts a short while.
After receiving the letter of acceptance, I was in a state of euphoria.
CHERISH means to love someone or something very much and wanting to protect them or it
I will always cherish the letter he wrote to me before he moved away.
ETERNITY means time without end for example.
A Mother's Love last for eternity.
QUINTESSENCE means the perfect example of something.
It was the quintessence of an English Country Cottage (If you see a perfect Country Cottage with beautiful light stone and roses up it, so you can say that is the quintessence of an English country cottage).
PLETHORA means an amount that is greater than is needed or can be used
The article contained a plethora of information (We're implying that there's slightly too much information, maybe in a good way, just so much information, more than I could ever take in.)
PRISTINE means fresh and clean as if new.
Her house is always pristine.
SURREPTITIOUSLY means in a quick or secret way so that people don't notice.
She surreptitiously slid the check under his napkin.
DULCET means sounding sweet and pleasant and is often paired with tones. (If you're talking about somebody's dulcet tones it means that sweet voice)
I can always recognize her dulcet tones (I can always recognize her lovely voice)
DOCILE means quiet and easy to control. We often use it to talk about animals that are very sweet-natured
The puppy is calm and incredibly docile.