Dict: strongs - permanence

Strongs:

H386 @ איתן 'êythân ay-thawn' From an unused root (meaning to continue); permanence; hence (concretely) permanent; specifically a chieftain: - {hard} {mighty} {rough} {strength} strong.

H8411 @ תּדירא tedîyrâ' ted-ee-raw' (Chaldee); from H1753 in the original sense of enduring; {permanence} that {is} (adverbially) constantly: - continually.