fundament

/fundament/

Cases

SingularPluralWhen to use it
nominativefundamentthe foundationfundamentlethe foundationsthe plain dictionary form — the doer of the sentence
genitivefundamentnithe foundation'sfundamentlenithe foundations'the owner — whose it is
accusativefundamentnithe foundation (as the object)fundamentlenithe foundations (as the object)a specific, known object — whom or what
dativefundamentgeto the foundationfundamentlegeto the foundationsdirection or recipient — to where, to whom
locativefundamentdeat / in the foundationfundamentledeat / in the foundationswhere it is; also having — mende bar, "I have it"
ablativefundamentdenfrom the foundationfundamentledenfrom the foundationswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
myfundamentimmy foundationfundamentlerimmy foundations
yourfundamentingyour foundationfundamentleringyour foundations
his / herfundamentihis / her foundationfundamentlerihis / her foundations
ourfundamentibizour foundationfundamentleribizour foundations
you all'sfundamentigizyou all's foundationfundamentlerigizyou all's foundations
theirfundamentleritheir foundationfundamentleritheir foundations

The overlap in the last rows is real, not a mistake: fundamentleri can mean "his / her foundations", "their foundation", or "their foundations" — context decides.