Was heißt »beharrlich« auf Englisch?

Das Adjektiv »beharrlich« lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

Er war beharrlich.: He was tenacious.
Er war sehr beharrlich.: He was very insistent.
Sie war sehr beharrlich.: She was very insistent.
Ihr seid beharrlich.: You're persevering.
Ich bin beharrlich.: I'm persevering.
Anne weigerte sich beharrlich zu gestehen.: Anne steadfastly refused to confess.
Tom ist beharrlich.: Tom is persistent.
Es schneit beharrlich.: It's snowing persistently.; The snow is persistent.; There's persistent snow.
Tom war sehr beharrlich.: Tom was very insistent.

ausdauernd:: persevering; persistant; stamina; tenacious
dauernd:: continuous
eisern:: iron
hartnäckig:: adamantine; besetting; bulldog; confirmed; do-or-die; dogged; doggedly; insistent; intractable; obstinate; obstinately; persevering; pertinacious; pertinaciously; refractory; stiff-necked; strongheaded; stubborn; stubbornly; tenacious; tough
insistent:: insistent
konsequent:: consequential; forceful
konstant:: constant; constantly
laufend:: constant; current; ongoing; pending
pausenlos:: continuous; non-stop
penetrant:: obtrusive; pushy
standhaft:: steadfast
unablässig:: incessant; unremitting
unbeirrbar:: undeviating
unbeirrt:: enduring
unermüdlich:: indefatigable; tireless
unerschütterlich:: unshakeable
unnachgiebig:: inflexible; intransigent
ununterbrochen:: continuous; incessant; unbroken; uninterrupted
unverdrossen:: steady

Have you had persistent headaches recently?
Tom had a persistent cough.
Tom is persistent, isn't he?
Tom is very persistent, isn't he?
People like us, who believe in physics, know that the distinction between past, present, and future is only a stubbornly persistent illusion.
Tom is very persistent.
I have a persistent cough.
How persistent you are!