is similar to
lacking in resolution
"the accident left others discouraged about going there"
is similar to
lacking firmness of will or character or purpose
"infirm of purpose; give me the daggers" - Shakespeare
is similar to
disposed to psychological variability
"his rather unstable religious convictions"
is similar to
uncertain in purpose or action
is similar to
lacking will power or resolution
"the role of the dissenter is not for the weak-kneed"
see also
not definitely settling something
"a long and indecisive war"