Words that I've learned...

[jess_john]

Sextant - a navigator's instrument, so named because its arc is 60 degrees, one sixth or a circle.
sextus= sixth

[jess_john]

Decimate - Originally, this meant to execute one chosen by lot out of ten; as now used, to kill or destroy totally or almost totally.

[jess_john]

Quarantine - the isolation of persons and animals carrying or suspected of carrying contagious diseases.
Figuratively, the verb quarantine means to isolate or to cut off somebody or even a nation from normal relations with society or other nations.
From french word quarante, a period of forty days.

[jess_john]

effervesce "to begin to boil over"; to bubble
effervescent "boiling over"; bubbling; ebullient
effervescence "a boiling over'; a bubbling; excitement

[jess_john]

manumission n.- "sending away from the master's hand" or power; emancipation
manumit v.- emancipation; free from bondage

[jess_john]

Germane adj- pertinent to what is being discussed or explained: closely connected

[jess_john]

sapid- "flavorsome"; savory
insipid- "not sapid," hence tasteless, flat, dull
limpid- perfectly clear (like water) and figuratively of one's style in writing

[jess_john]

froward adj.- "in a direction from," hence contrary, perverse, willfully stubborn.

[jess_john]

untoward - un+to+ward: unfavorable; inconvenient

[jess_john]

minuscule adj-"less+ small'; very small; infinitesimal