to cost; to spend; fee; wasteful; expenses

cost; expenditure; expense; CL:筆|笔[bi3],個|个[ge4]

Philadelphia, Pennsylvania; abbr. for 費拉德爾菲亞|费拉德尔菲亚[Fei4 la1 de2 er3 fei1 ya4]

to take a lot of trouble (over sb or sth); may I trouble you (to do sth)

to require effort; strenuous

to expend a great deal of effort

Felix

(name) Fisher or Fischer

troublesome; to take a lot of trouble to do sth

(loanword) fellah

Fei County or Feixian, a county in Linyi City 臨沂市|临沂市[Lin2 yi2 Shi4], Shandong

to take time; time-consuming

Feinman or Feynman (name); Richard Feynman (1918-1988), US physicist, 1965 Nobel prize laureate together with TOMONAGA Shin'ichirō and Julian Schwinger

rate; tariff

to spend effort; to take trouble; May I trouble you to...? (as part of polite request); Please would you mind...?

Fermi (name); Enrico Fermi (1901-1954), Italian born US nuclear physicist

to be puzzled; hard to understand; unintelligible; incomprehensible

to talk at length; to waste one's breath; variant of 廢話|废话[fei4 hua4]

Pierre de Fermat (1601–1665), French mathematician

erhua variant of 費勁|费劲[fei4 jin4]

Fallujah, Iraqi city on Euphrates

to argue needlessly; to waste time explaining

to spend (much) effort; to go through (a lot of) trouble

to argue needlessly; to waste time explaining

Fei Xiaotong (1910-2005), Chinese sociologist

Pierre de Fermat (1601–1665), French mathematician

to spend a great deal of time and effort; (of a task) demanding; exacting

Roger Federer (1981-), Swiss tennis star

pheromone

(physics) fermion

Fabian Society

Le Figaro

Theodor of Fyodor (name)

Ludwig Feuerbach (1804-1872), materialist philosopher

the Ferghana Valley (in Uzbekistan, central Asia)

to rack one's brains (idiom); to take great pains to think sth through

to rack one's brains for schemes (idiom); to beat one's brains out

arduous and thankless task (idiom); strenuous and unrewarding

(math.) Fermat's Last Theorem

the Ferghana Valley in modern Uzbekistan

Philadelphia, Pennsylvania; abbr. to 費城|费城[Fei4 cheng2]